Automatic transmission capable of executing cutback control

Details Automatic transmission capable of executing cutback control Automatic transmission capable of executing cutback control

1990-11-07

1992-04-07

Braun, Leslie A.

Machine element or mechanism

Rotary driven device adjustable during operation relative to...

Screw and nut adjusting means

74867, 74866, B60K 4106

Patent

active

051016869

ABSTRACT:
An automatic transmission includes a transmission mechanism providing a high speed gear ratio and a low speed gear ratio, a hydraulic control circuit having a cutback device settable in one of a cutback execution state and a cutback suspension state, a primary control device for setting the cutback device in the cutback execution state when the gear ratio is a low speed, and setting the cutback device in the cutback suspension state when the gear ratio is a high speed, a secondary control device for setting the cutback device in the cutback suspension state when the gear ratio is a high speed, and a selection device for selecting the primary control device when the oil temperature is lower than a predetermined value, and selecting the secondary control device when the oil temperature is higher than the predetermined value.

REFERENCES:
patent: 3695122 (1972-10-01), Irie et al.
patent: 3709066 (1973-01-01), Burcz
patent: 3731558 (1973-05-01), Enomoto
patent: 4524645 (1985-06-01), Tatsumi
patent: 4676348 (1987-06-01), Coutant
patent: 4733581 (1988-03-01), Hasegawa et al.
patent: 4779489 (1988-10-01), Haley
patent: 4870581 (1989-09-01), Ito et al.
patent: 4998449 (1991-03-01), Baba et al.
patent: 5022284 (1991-07-01), Shimei
patent: 5029492 (1991-07-01), Kiuchi

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