Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1984-02-17
1986-10-21
Dorner, Kenneth J.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74864, 74759, B60K 4108, F16H 5710
Patent
active
046178414
ABSTRACT:
Disclosed herein is a hydraulic control system for an automatic transmission which is shiftable from a 4th speed ratio to a 2nd speed ratio. A 2-3 shift valve (24) has a first port (124g) communicating with a first friction unit (C3) and a second port (124h) communicating with a fluid conduit (412) supplied with an actuating fluid pressure. The first port (124g) is allowed to communicate with the first port (124h) when the 2-3 shift valve (24) assumes a downshift position thereof. A 4-3-2 changeover valve (23) is provided which urges a 2-3 shift valve (22) toward a downshift position thereof when a fluid pressure in the first port (124g) increases beyond a predetermined value.
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Andrews Stephen B.
Dorner Kenneth J.
Nissan Motor Co,. Ltd.
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