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AssigneeAisin Aw Co., Ltd.
InventorsShuzo Moroto, Shiro Sakakibara, Hidehiro Kondo, Takesi Inuzuka, Masahiro Hasebe
Estimating the term…
A manual speed selector of an automatic vehicle transmission in which a line pressure is supplied from a manual valve capable of being changed over by a shift lever to control a plurality of solenoid valves so as to selectively supply hydraulic pressure to frictional engagement devices by shift valves. The shift lever can be moved between an automatic shift mode position and a manual shift mode position, and a transitive position is provided between these two mode positions. At the transitive position, the manual valve is set in a position such as to supply hydraulic pressure to set a neutral state based on the control of the solenoid valves. The shift lever can be immediately moved from this position to directly select any speed in the automatic shift mode or the manual shift mode. The above solenoid valves, a hydraulic control solenoid valve and a lock-up clutch engaging solenoid valve are controlled to enable rapid shifting in the manual shift mode as well as smooth shifting in the automatic shift mode.
A manual speed selector for an automatic transmission for a vehicle having a plurality of frictional engagement elements and a torque converter with a lock-up clutch, said manual speed selector comprising:
A hydraulic control system for controlling operation of a plurality of frictional engagement devices for establishing various speed ranges in a vehicle transmission including a lock-up clutch, either automatically in an automatic shift mode or in a manual shift mode responsive to manual shifting, said control system comprising:
Dependencies are inferred from the claim text.