Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1989-07-19
1991-04-16
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74867, B60K 4118
Patent
active
050073087
ABSTRACT:
A line pressure control during a shifting operation of an automatic transmission is disclosed. Quality of each shifting operation is represented by a predetermined variable, viz, an inertia phase time during which a gear ratio undergoes a variation. When a deviation between circumstances detected upon occurrence of a shifting operation and predetermined circumstances under which a target value is set fails to fall in a predetermined range, a deviation indicative signal is generated. Upon absence of this deviation indicative signal after completion of the shifting operation, the inertia phase time measured during the shifting operation is compared with the target value and the line pressure is adjusted in response to this comparison result when the shifting operation of the same kind is to occur under substantially the same circumstances detected. In other words, the learning to adjust the line pressure is prohibited when the deviation indicative signal is present.
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Nissan Full-Range Automatic Transmission RE4R01A Type, Service Manual, 1987.
Nissan Motor Co,. Ltd.
Wright Dirk
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