Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1987-01-02
1988-03-15
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
3644241, B60K 4118
Patent
active
047305193
ABSTRACT:
The automatic transmission has clutches and brakes to change the gear ratio. The clutches and brakes are independently actuated by hydraulic servos. A hydraulic circuit supplies oil to and from the servos to either actuate or release them. Within the hydraulic circuit are solenoids which respond to an electronic control. The electronic control regulates the pressure in the hydraulic servos by supplying signals to the solenoids. By providing a predetermined time delay in the sending of a signal to the on-coming servo during a gear shift, a smoother shift can be achieved. The shift is further improved by varying the time delay by a predetermined value based on the previous condition of the off-going servo.
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patent: 4611285 (1986-09-01), Weisman, II
Nakamura Yasunari
Shindo Yoshio
Toyota Jidosha & Kabushiki Kaisha
Wright Dirk
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