Shift control system for selecting between two shift patterns ba

Details Shift control system for selecting between two shift patterns ba Shift control system for selecting between two shift patterns ba

1994-01-18

1995-06-20

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

477174, 477 97, F16H 6102

Patent

active

054256879

ABSTRACT:
A shift control system controls an automatic transmission of a vehicle wherein half-lock-up control for a lock-up clutch is executed when the running state of the vehicle is in a predetermined operative range. The shift control system includes a half-lock-up control inhibiting unit for inhibiting the half- Lock-up control from being executed when the running state of the vehicle is held in a specific operative state even though the running state of the vehicle is in the predetermined range, a determining unit for determining whether or not the half-Lock-up control is inhibited by the half- lock-up control inhibiting means, and a controlling unit for controlling the automatic transmission such that a low speed stage at which the half-lock-up control is easily executed is positively utilized when it is determined that the half-lock-up control is not inhibited by the determining unit, and moreover, controlling shift change of the automatic transmission such that a high speed stage having a gear ratio lower than that at the lower speed stage is positively utilized when it is determined that the half-lock-up control is inhibited by the determining unit.

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