Oil pressure control means for an automatic transmission

Details Oil pressure control means for an automatic transmission Oil pressure control means for an automatic transmission

1978-02-21

1980-08-26

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Operators

192 8718, 192109F, F16D 2510

Patent

active

042191092

ABSTRACT:
An oil pressure control means for an automatic transmission having a gear mechanism, low and high speed friction engaging means and high and low speed accumulators, wherein in downshifting the operating pressure of the high speed accumulator is reduced abruptly to a level which causes slippage of the high speed friction engaging means in accordance with the rise of the oil pressure in the low speed friction engaging means up to a predetermined level and the operating pressure of the low speed accumulator is increased abruptly to a level which causes substantial engagement of the low friction engaging means in accordance with the reduction of the oil pressure in the high speed friction engaging means to a predetermined level.

REFERENCES:
patent: 3541791 (1970-11-01), Lvovsky et al.
patent: 3572177 (1971-03-01), Ishihara
patent: 3602344 (1971-08-01), Clark
patent: 3618727 (1971-11-01), Cornet
patent: 3692160 (1972-09-01), Hilpert

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