Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Reexamination Certificate
2006-07-11
2006-07-11
Ho, Ha (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
C477S132000, C477S139000, C477S140000
Reexamination Certificate
active
07074158
ABSTRACT:
A shift control apparatus of an automatic transmission of a motor vehicle to which torque is transmitted from an engine via a fluid coupling device is provided. In the automatic transmission including a plurality of hydraulically operated friction elements, a clutch-to-clutch downshift is carried out during coasting of the vehicle by releasing one of the friction elements and engaging another friction element. A controller of the shift control apparatus detects a difference between input and output rotation speeds of the fluid coupling device, and increases an engine speed by a controlled amount based on the difference between the input and output rotation speeds when the clutch-to-clutch downshift is carried out during coasting of the vehicle, so that the vehicle is brought into a minimal driving state in which the engine speed is slightly higher than the output rotation speed of the fluid coupling device.
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Ayabe Atsushi
Kato Shinji
Kimura Hiromichi
Nakamura Mitsuhiro
Ogasawara Hideaki
Aisin AW Co. Ltd.
Ho Ha
Toyota Jidosha & Kabushiki Kaisha
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