Line pressure control arrangement for automatic automotive trans

Details Line pressure control arrangement for automatic automotive trans Line pressure control arrangement for automatic automotive trans

1989-04-11

1990-11-27

Diehl, Dwight

Machine element or mechanism

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

Preselected indexed position

B60K 4106

Patent

active

049727389

ABSTRACT:
During non-shift modes of transmission operation, the line pressure is controlled according to a first control schedule. Upon a shift being initiated a second control schedule is used. The use of this schedule is maintained until such time as the ratio of the transmission input shaft rotational speed to the transmission output shaft rotational speed reaches a predetermined limit whereafter a third control schedule is utilized. Control is switched from the third control schedule to the first one upon the expiration of a predetermined period which is timed from the point in time a decision that a shaft between gears of the transmission should be implemented.

REFERENCES:
patent: 4283970 (1981-08-01), Vukovich
patent: 4476745 (1984-10-01), Moan
patent: 4653350 (1987-03-01), Downs et al.
patent: 4680992 (1987-07-01), Hayasaki et al.
patent: 4722247 (1988-02-01), Shindo et al.
patent: 4730519 (1988-03-01), Nakamura et al.
patent: 4742461 (1988-05-01), Eschrich et al.
patent: 4795011 (1989-01-01), Ushijima et al.
patent: 4805750 (1989-02-01), Nitz
patent: 4831899 (1989-05-01), Honig
patent: 4855913 (1989-08-01), Brekkestran
Nissan Service Manual, Nissan Motor Company, 1987, pp. 1-90.

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