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:
Sep. 30, 2014
Filed:
Aug. 22, 2012
Sergio Stucchi, Orbassano, IT;
Onofrio DE Michele, Orbassano, IT;
Raffael Ricco, Orbassano, IT;
Marcello Gargano, Orbassano, IT;
Francesco Vattaneo, Orbassano, IT;
Domenico Lepore, Orbassano, IT;
Sergio Stucchi, Orbassano, IT;
Onofrio De Michele, Orbassano, IT;
Raffael Ricco, Orbassano, IT;
Marcello Gargano, Orbassano, IT;
Francesco Vattaneo, Orbassano, IT;
Domenico Lepore, Orbassano, IT;
C.R.F. Societa Consortile per Azioni, Orbassano (Torino), IT;
Abstract
An internal-combustion engine with two intake valves for each cylinder is provided with a system for variable actuation of the intake valves, comprising a single solenoid valve for each cylinder that controls communication of the pressurized-fluid chamber of the system with an exhaust channel. The solenoid valve is a three-way, three-position solenoid valve, comprising an inlet permanently communicating with the pressurized-fluid chamber and with the hydraulic actuator of an intake valve, and two outlets communicating, respectively, with the actuator of the other intake valve and with said exhaust channel. The solenoid valve has a first position, in which the inlet communicates with both of the outlets, a second position, in which the inlet communicates only with the aforesaid outlet connected to the actuator of an intake valve and does not communicate, instead, with the outlet connected to the exhaust channel, and a third position, in which the inlet does not communicate with any of the two outlets.