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Machine translation
1. (WO1981001597) HYDRAULIC CONTROL TYPE AUTOMATIC TRANSMISSION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001597    International Application No.:    PCT/JP1980/000292
Publication Date: 11.06.1981 International Filing Date: 29.11.1980
IPC:
F16H 59/68 (2006.01), F16H 61/02 (2006.01)
Applicants:
Inventors:
Priority Data:
79/153545 29.11.1979 JP
Title (EN) HYDRAULIC CONTROL TYPE AUTOMATIC TRANSMISSION
(FR) TRANSMISSION AUTOMATIQUE DU TYPE A COMMANDE HYDRAULIQUE
Abstract: front page image
(EN)A hydraulic control type automatic transmission includes at least one shift valve (131, 132) which operates in accordance with a prescribed relationship between a vehicle speed and an engine load to selectively supply a plurality of frictional elements (104, 105, 106, 107) with hydraulic pressure, thereby engaging or disengaging the frictional elements The automatic transmission further includes shift valve operation detecting switch means (41, 42, 43, 44; 46, 47, 48; 229, 230) which responds directly to the displacement of the spool (160, 164) of the shift valve to generate an electrical output signal representing the operating state of the shift valve immediately before the frictional elements are actually engaged or disengaged, which signal is used, for example, to disengage a direct-coupled clutch (5) at the time that the vehicle speed is shifted. The switch means in a preferred embodiment includes a stationary contact made of U-shaped leaf springs (229, 230) mounted on the end wall (40) of the shift valve opposite to a spool serving as a movable contact. The stationary contact is retained in contact with or separated from the spool until the pressure receiving area of the stationary contact abruptly varies at the position where the spool is displaced between both end positions.
(FR)Une transmission automatique du type a commande hydraulique comprend au moins une soupape de changement (131, 132) qui fonctionne d"apres une relation preetablie entre la vitesse d"un vehicule et la charge d"un moteur pour fournir de maniere selective une pression hydraulique a une pluralite d"elements de frottement (104, 105, 106, 107), de maniere a engager ou degager les elements de frottement. La transmission automatique comprend en outre des moyens de commutation de detection du fonctionnement de la soupape de deplacement (41, 42, 43, 44; 46, 47, 48; 229, 230) qui repondent directement au deplacement du tiroir (160, 164) de la soupape de changement pour generer un signal electrique de sortie representant l"etat de fonctionnement de la soupape de changement immediatement avant que les elements de frottement ne soient reellement engages ou degages, lequel signal est utilise, par exemple, pour debrayer un embrayage a accouplement direct (5) au moment ou la vitesse du vehicule est changee. Les moyens de commutation dans un mode preferentiel de realisation comprennent un contact stationnaire constitue par des ressorts a lames en forme de U (229, 230) montes sur la paroi extreme (40) de la soupape de changement a l"oppose d"un tiroir servant de contact mobile. Le contact stationnaire est retenu en contact avec le tiroir ou separe de ce dernier jusqu"a ce que la zone de reception de la pression du contact stationnaire varie brusquement dans la position ou le tiroir est deplace entre les deux positions extremes.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)