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:
Nov. 02, 2010
Filed:
Feb. 20, 2008
Maurizio Uberti, Turin, IT;
Valter Pastorello, Turin, IT;
Carlo Emilio Baret, Orbassano, IT;
Gian Luigi Pregnolato, Orbassano, IT;
Marco Garabello, Orbassano, IT;
Dario Caenazzo, Orbassano, IT;
Maurizio Uberti, Turin, IT;
Valter Pastorello, Turin, IT;
Carlo Emilio Baret, Orbassano, IT;
Gian Luigi Pregnolato, Orbassano, IT;
Marco Garabello, Orbassano, IT;
Dario Caenazzo, Orbassano, IT;
C.R.F. Societa Consortile per Azioni, Orbassano (Torino), IT;
Abstract
The electro-hydraulic control system comprises a gear shift control device and a hydraulic control circuit. The gear shift control device includes four shift forks, operatively associated each to a respective engagement sleeve of the transmission to cause this latter to move between first and second engagement positions, and an operating unit comprising four double-acting hydraulic actuators arranged to control each the displacement of a respective shift fork. The hydraulic control circuit comprises a supply unit, a distributor valve adapted to select every time one of the four hydraulic actuators and two solenoid valves adapted to control the hydraulic actuator selected by the distributor valve. The distributor valve has four operating positions, each of which corresponds to the selection of a respective hydraulic actuator. The two solenoid valves are arranged to be connected each to a respective pressure chamber of the hydraulic actuator selected by the distributor valve.