Machine element or mechanism – Gearing – Interchangeably locked
Patent
1997-04-09
2000-05-02
Marmor, Charles A
Machine element or mechanism
Gearing
Interchangeably locked
74330, 192 8718, 192 8715, F16D 4802
Patent
active
060558792
ABSTRACT:
A hydraulic control system for an automatic transmission of multiple clutch type, in which a switchover valve (2 in FIG. 4) for switching-over clutch control pressures includes two spool valvules (4 and 6). When one of two clutches (C1 and C2) is supplied with the clutch control pressure and is held in engagement, the spool valvules (4 and 6) operate to cut off the supply of the clutch control pressure for the other clutch to-be-disengaged and to hold the engagement of one clutch to-be-engaged. Thus, even when the supply source (12 or 14) of the clutch control pressure has failed, the clutches (C1 and C2) are prevented from coming into multiple engagement.
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Patent Abstracts of Japan, vol. 7, No. 31 (M-192), Feb. 8, 1983, JP 57-184730, Nov. 13, 1982.
Abe Akiharu
Habuchi Ryoji
Kinoshita Masafumi
Kuramochi Kojiro
Marmor Charles A
Parekh Ankur
Toyota Jidosha & Kabushiki Kaisha
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