Control system for automatic transmission

Details Control system for automatic transmission Control system for automatic transmission

1991-12-24

1993-05-18

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

3644241, B60K 4118

Patent

active

052110818

ABSTRACT:
A control system for an automatic transmission including a main transmission and a subtransmission whose shift operation is carried out by hydraulically. The control system comprises a first device for adjusting a gear ratio advance of the main transmission, the gear ratio advance corresponding to a gear ratio change during the shift operation, a second device for adjusting a gear ratio advance of the subtransmission, the gear ratio advance corresponding to a gear ratio change during the shift operation, and a device for controlling the frist adjusting device and the second adjusting device during concurrent shift operations of the main transmission and the subtransmission so that the gear ratio advances of the main transmission and the subtransmission become equal to respective predetermined target gear ratio advances.

REFERENCES:
patent: 4690017 (1987-09-01), Taniguchi et al.
patent: 4858500 (1989-08-01), Harada et al.
patent: 4967355 (1990-10-01), Iwatsuki et al.
patent: 4991099 (1991-02-01), Markyvech et al.
patent: 5089965 (1992-02-01), Braun
patent: 5109731 (1992-05-01), Iwatsuki et al.

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