Control system for an automatic transmission of a motor vehicle

Details Control system for an automatic transmission of a motor vehicle Control system for an automatic transmission of a motor vehicle

1989-05-19

1991-01-15

Scherbel, David A.

Machine element or mechanism

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

Preselected indexed position

74867, B60K 4112

Patent

active

049844830

ABSTRACT:
A control system for an automatic transmission apparatus for vehicle in which, when an instruction signal to start a speed shift is generated, the engaging force of one engaging element to be released is controlled so that the rotation speed of the input shaft is regulated to be equal to a predetermined reference rotation speed higher that the rotation speed before the generation of the instruction signal and, after an effective shift is detected, the engaging force of the other engaging element to be engaged is controlled so that the changing rate of the rotation speed of the input shaft converges to a predetermined reference changing rate, thereby preventing simultaneous complete engagement of both engaging elements and accomplishing a smooth change-over of the torque transmission path.

REFERENCES:
patent: 3754482 (1973-08-01), Sanders et al.
patent: 3956947 (1976-05-01), Leising et al.
patent: 4314340 (1982-02-01), Miki et al.
patent: 4354236 (1982-10-01), Miki et al.
patent: 4393467 (1983-07-01), Miki et al.
patent: 4527678 (1985-01-01), Pierce et al.
patent: 4693143 (1987-09-01), Harada et al.
patent: 4775938 (1988-10-01), Hiramatsu
patent: 4790418 (1988-12-01), Brown et al.

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