Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1985-10-04
1988-02-02
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74867, 74740, 74752C, B60K 4118, B60K 4116
Patent
active
047222476
ABSTRACT:
In a shift control system of an automatic transmission, wherein the shift control system includes a first and a second transmissions capable of automatically switching speeds separately of one another, and the first and the second transmissions are shifted simultaneously or alternately, to thereby achieve multi-speed shifts, there is provided a system for starting and completing changes in rpm for the shift of rotary members of the second transmission during the operation of changes in rpm for the shift of rotary members of the first transmission, particularly when the first transmission is high gear shifted and the second transmission is shifted simultaneously, whereby the automatic transmission as a whole is up shifted, so that the shift characteristics can be maintained satisfactorily. In this case, an acting force of a frictionally engaging device during the operation of shift of the transmission is maintained at a predetermined value for a predetermined period of time so as to prevent a neutral portion on the intermediate portion of a series of torque transmitting system from occurring instantaneously to fluctuate an output torque.
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Ando Yasushi
Iwatsuki Kunihiro
Shindo Yoshio
Toyota Jidosha & Kabushiki Kaisha
Wright Dirk
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