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:
Oct. 26, 2010
Filed:
Dec. 12, 2007
Gianluca Canino, Orbassano, IT;
Luca Gentile, Orbassano, IT;
Laura Gianolio, Orbassano, IT;
Maria Grazia Lisbona, Orbassano, IT;
Francesco Vattaneo, Orbassano, IT;
Gianluca Canino, Orbassano, IT;
Luca Gentile, Orbassano, IT;
Laura Gianolio, Orbassano, IT;
Maria Grazia Lisbona, Orbassano, IT;
Francesco Vattaneo, Orbassano, IT;
C.R.F. Societa Consortile per Azioni, Orbassano (Torino), IT;
Abstract
An internal combustion engine is equipped with a variable actuation system for the intake valves, including a chamber of fluid under pressure interposed between the intake valve and the respective controlling cam, and a solenoid valve whose opening causes the pressure chamber to discharge such as to determine the rapid closure of the valve by effect of the respective biasing spring means, even when the respective cam would tend to keep the valve open. The variable valve operation system is used in combination with the use of cams controlling the intake valves shaped in such a manner as to give rise to an intake valve lift profile including a boot portion at substantially constant lift.