Shift control system of automatic transmission for vehicle

Details Shift control system of automatic transmission for vehicle Shift control system of automatic transmission for vehicle

1985-11-22

1988-01-12

Herrmann, Allan D.

Machine element or mechanism

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

Preselected indexed position

74752A, 74869, B60K 4104

Patent

active

047183101

ABSTRACT:
A shift control system of an automatic transmission for a vehicle, which includes at least a first transmission and a second transmission, both of which can shift speeds automatically, wherein the first transmission and the second transmission are shifted simultaneously or alternately to achieve multi-speed shifts, an acting force of a frictionally engaging device for switching the second transmission can be properly changed at least in accordance with the types of shifts at the time of switching of the frictionally engaging device, so that, even when any type of shift is performed, the stable shift characteristics having a low shift shock is constantly obtained and no excessive load is applied to the frictionally engaging device.

REFERENCES:
patent: 2923175 (1960-02-01), Perkins
patent: 4314340 (1982-02-01), Miki et al.
patent: 4324153 (1982-04-01), Sugimoto et al.
patent: 4335428 (1982-06-01), Miki et al.
patent: 4367528 (1983-01-01), Kawamoto et al.
patent: 4432255 (1984-02-01), Borman et al.
patent: 4441385 (1984-04-01), Taga et al.
patent: 4513850 (1985-04-01), Plate
patent: 4527448 (1985-07-01), Person et al.

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