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:
Jul. 26, 2011
Filed:
Feb. 22, 2007
Stefano Re Fiorentin, Grugliasco, IT;
Mario Palazzetti, Avigliana, IT;
Stefano Re Fiorentin, Grugliasco, IT;
Mario Palazzetti, Avigliana, IT;
Fiat Auto SpA, Turin, IT;
Abstract
The device is adapted to control the movement of a valve () of an internal combustion engine comprising a stem () which may move in translation through an opening () of a hollow guide body () and which ends in a mushroom head () cooperating in operation with a valve seat () provided in a wall () of the engine head. The valve () may move in translation with respect to the hollow guide body () between a retracted position and a forward position in which the mushroom head () respectively closes and opens the associated valve seat (). The control device comprises The arrangement is such that when the electromagnet () is de-energised, the valve () moves in acceleration towards the open position under the action of the first spring () until the action of the latter stops, and then the valve () moves in deceleration into the open position under the action of the second spring ().