Shift control apparatus for automatic transmission

Details Shift control apparatus for automatic transmission Shift control apparatus for automatic transmission

2006-02-14

2006-02-14

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

C477S143000, C477S144000

Reexamination Certificate

active

06997843

ABSTRACT:
In a shift control apparatus for an automatic transmission, there is provided a target speed change permitting means which; at the time of a dual changeover shift which is a shift from an Nth speed achieved by bringing a first friction element and a second friction element to an engagement state, to an (N-α)th speed achieved by engaging a third friction element and a fourth friction element, and which has at least one intermediate speed, between the Nth speed and the (N-α)th speed, achieved by engaging the second friction element and the third friction element; checks a driver's shift intention again at the time of attainment of the gear ratio corresponding to the intermediate speed, and permits the target speed to be changed to the speed according to the driver's intention when the target speed is different from the (N-α)th speed.

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