Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-05-27
1999-07-20
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477143, F16H 6108
Patent
active
059249579
ABSTRACT:
A speed change control system for an automatic transmission which includes a plurality of frictional engagement elements and in which a first speed change unit for executing a clutch-to-clutch shift by applying/releasing two frictional engagement elements simultaneously and a second speed change unit for executing a speed change by applying a one-way clutch are connected in tandem. The decision is made upon both the clutch-to-clutch shift of the first speed change unit and the speed change, as effected by applying the one-way clutch of the second speed change unit. At the speed change time, the clutch-to-clutch shift is established before the application of the one-way clutch. According to the present invention, therefore, the clutch-to-clutch shift at the first speed change unit of the automatic transmission, as accompanied by the application of the one-way clutch at the second speed change unit, can be easily controlled to prevent the shift shock.
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Kimura Hiromichi
Yasue Hideki
Lund Scott
Marmor Charles A.
Toyota Jidosha & Kabushiki Kaisha
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