Speed change control apparatus and method for automatic transmis

Details Speed change control apparatus and method for automatic transmis Speed change control apparatus and method for automatic transmis

1981-10-19

1984-10-16

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0092, 192 329, 192 358, B60K 4128

Patent

active

044769709

ABSTRACT:
A direct coupled clutch is provided in parallel to a fluid type torque converter in an automatic transmission, and supply of oil pressure to a hydraulic servo of the direct coupled clutch is controlled by an electromagnetic valve. Alteration of engaging condition of engaging elements in a transmission gear is carried out by maintaining the direct coupled clutch in the disengaging condition. As a result, difference of torque between the engine side of the engaging elements and the drive wheel side, which difference is produced in the speed change, is absorbed by the fluid type torque converter so that impact is restrained.

REFERENCES:
patent: 3448640 (1969-06-01), Nelson
patent: 4041809 (1977-08-01), Dick et al.
patent: 4270636 (1981-06-01), Sunohara et al.
patent: 4377226 (1983-03-01), Chevalier et al.
patent: 4386687 (1983-06-01), Chevalier et al.

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