Shift control system for automatic transmission

Details Shift control system for automatic transmission Shift control system for automatic transmission

1989-03-29

1990-11-20

Diehl, Dwight

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

3644241, B60K 4106

Patent

active

049709160

ABSTRACT:
The states of two solenoids which control four forward gears of a transmission, are toggled between ON and OFF states in response to the outcome of a comparative ranging of a ratio with limits derived from pre-recorded data. In the case of a power ON upshift data which is recorded in terms of throttle opening is used. On the other hand, when a power OFF upshift is induced by releasing the vehicle accelerator pedal, data which is recorded in terms of vehicle speed is used to set the limits.

REFERENCES:
patent: 4473882 (1984-09-01), Suzaki et al.
patent: 4527678 (1985-07-01), Pierre et al.
patent: 4665777 (1987-05-01), Kikuchi et al.
patent: 4680992 (1987-07-01), Hayasaki et al.
patent: 4691597 (1987-09-01), Leorat et al.
patent: 4698763 (1987-10-01), Smyth
patent: 4703519 (1988-03-01), Nakamura et al.
patent: 4730520 (1988-03-01), Nishikawa et al.
patent: 4848529 (1989-07-01), Kurihara et al.
Nissan Service Manual, 1987, pp. 1-90.

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