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公开(公告)号:US5211081A
公开(公告)日:1993-05-18
申请号:US812814
申请日:1991-12-24
申请人: Keiji Bota , Hidehiko Mishima , Hiroto Kawano , Takuro Shigemura , Toshihisa Marusue , Kotaro Ninomiya
发明人: Keiji Bota , Hidehiko Mishima , Hiroto Kawano , Takuro Shigemura , Toshihisa Marusue , Kotaro Ninomiya
CPC分类号: F16H61/0437 , F16H61/702 , F16H2061/0451 , F16H2306/44 , F16H2306/52 , F16H61/08 , F16H61/686 , Y10S477/908 , Y10T477/693
摘要: A control system for an automatic transmission including a main transmission and a subtransmission whose shift operation is carried out by hydraulically. The control system comprises a first device for adjusting a gear ratio advance of the main transmission, the gear ratio advance corresponding to a gear ratio change during the shift operation, a second device for adjusting a gear ratio advance of the subtransmission, the gear ratio advance corresponding to a gear ratio change during the shift operation, and a device for controlling the frist adjusting device and the second adjusting device during concurrent shift operations of the main transmission and the subtransmission so that the gear ratio advances of the main transmission and the subtransmission become equal to respective predetermined target gear ratio advances.