Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-08-05
1992-07-21
Bonck, Rodney H.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74866, B60K 4102
Patent
active
051312948
ABSTRACT:
An automatic transmission system includes a regulator for regulating line pressure delivered to friction coupling elements of a transmission mechanism. The friction coupling elements are selectively coupled and released, in combination, so as to shift gear ratios. A control device controls the regulator so as to provide a proper line pressure. The control device operates to learn a correction value for the line pressure which depends upon a shift-time it takes for the transmission to complete an up-shift and corrects the line pressure according to the correction value learned from an actual shift-time. Thus, an up-shifting of the transmission is completed in a desired shift-time. The correction of the line pressure in the learning control is practically performed when the number of engine cylinders for which fuel delivery is cut off is smaller than a predetermined number.
REFERENCES:
patent: 4226141 (1980-10-01), Espenschied
patent: 4283970 (1981-08-01), Vukovich
patent: 4347761 (1982-09-01), Ahlen
patent: 5036728 (1991-08-01), Kawasoe et al.
patent: 5043894 (1991-08-01), Yamaguchi
Bonck Rodney H.
Mazda Motor Corporatioon
Wittels Daniel
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