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Machine translation
1. (WO1980001502) ELECTROHYDRAULIC TRANSLATER DEVICE ALLOWING PARTICULARLY THE CONTROL OF A PRESSURE IN AN AUTOMATIC TRANSMISSION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001502    International Application No.:    PCT/FR1980/000006
Publication Date: 24.07.1980 International Filing Date: 17.01.1980
IPC:
F16K 31/06 (2006.01), G05D 16/20 (2006.01), F16H 61/02 (2006.01)
Applicants:
Inventors:
Priority Data:
7901267 18.01.1979 FR
Title (EN) ELECTROHYDRAULIC TRANSLATER DEVICE ALLOWING PARTICULARLY THE CONTROL OF A PRESSURE IN AN AUTOMATIC TRANSMISSION
(FR) DISPOSITIF TRADUCTEUR ELECTROHYDRAULIQUE PERMETTANT NOTAMMENT DE CONTROLER UNE PRESSION DANS UNE TRANSMISSION AUTOMATIQUE
Abstract: front page image
(EN)A coil of an electromagnet (29) subjects to an attraction force a moving platine (30) of magnetic material inside which is housed a ball (32) of non-magnetic material closing the end of a passage (33) for the hydraulic fluid. The device further comprises electronic means to supply the coil (29) with a pulse unidirectionnal current of which the cyclic ratio and the mean value are servo-controlled to an order value represented by an electric control signal. The device may be used as a hydraulic potentiometer for defining a pilot pressure proportional to an electric control signal in a hydraulic control circuit of an automatic transmission in industrial vehicles.
(FR)Une bobine d"electro-aimant (29) soumet a une force d"attraction un plateau mobile (30) en materiau magnetique a l"interieur duquel est logee une bille (32) en materiau non magnetique obturant l"extremite d"un passage (33) pour le fluide hydraulique. Le dispositif comprend en outre des moyens electroniques pour alimenter la bobine (29) au moyen d"un courant unidirectionnel pulse dont le rapport cyclique et la valeur moyenne sont asservis a une grandeur de consigne representee par un signal electrique de commande. Le dispositif peut etre utilise comme potentiometre hydraulique pour la definition d"une pression de pilotage proportionnelle a un signal electrique de commande dans un circuit hydraulique de commande d"une transmission automatique de vehicules industriels.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)