Sequential automatic transmission

Details Sequential automatic transmission Sequential automatic transmission

2011-07-12

2011-07-12

Holmes, Justin (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S080000

Reexamination Certificate

active

07976432

ABSTRACT:
To alleviate a shift shock of an automatic transmission when a vehicle travels at a certain vehicle speed and a speed range is changed over to a drive range from a neutral range. When a neutral range is selected by a range selection lever, a neutral determination part outputs a determination signal Nt. When a vehicle speed V is equal to or more than a vehicle speed reference value Vref, a vehicle speed determination part outputs a signal VJ2. When the vehicle speed V is less than the vehicle speed reference value Vref, a signal VJ1is outputted. The signal VJ1is inputted to a shift map, and a hydraulic control unit determines a speed change stage base on the vehicle speed and a throttle opening degree. When a signal VJ2is inputted to the hydraulic control unit, the shift stage is set at the neutral range.

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