Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-01-14
1992-03-24
Bonck, Rodney H.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74336R, 74339, 475278, 475153, 3644241, B60K 4118, B60K 4116
Patent
active
050977261
ABSTRACT:
A shift control system for an automatic transmission comprises: a gear train including a plurality of planetary gear sets having rotary components, an input shaft and an output shaft; a plurality of clutches for selectively connecting either the rotary components of the planetary gear sets with each other or the rotary components and the input shaft; and a plurality of brakes for holding the rotary components selectively in immovable states, any one of the planetary gear sets being adapted to take no part in the transmission of torque at one gear stage. The shift control system comprises: a shift judging device for judging that a shift is to be executed; a decision device for deciding that there is a planetary gear set which takes no part in the torque transmission at a gear stage to be set thereto as a result of executing the shift; a detection device for detecting the rotational speed of the rotary components of the planetary gear set which takes no part in the torque transmission at the gear stage; and an engagement control device for controlling the engaged states of the clutches or the brakes on the basis of the detection result by the detection device so that the revolving states of the rotary components of the planetary gear set taking no part in the torque transmission may be controlled.
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Bonck Rodney H.
Toyota Jidosha & Kabushiki Kaisha
Wittels Daniel
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