Timing control during downshift to engine braking range

Details Timing control during downshift to engine braking range Timing control during downshift to engine braking range

1991-06-21

1992-05-19

Wright, Dirk

Machine element or mechanism

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

Preselected indexed position

F16H 6108

Patent

active

051137224

ABSTRACT:
A timing control for an overrunning clutch is disclosed. A revolution speed ratio of an input shaft revolution speed to an output shaft revolution speed is employed as a parameter reflecting the progress in a downshift initiated by a select operation to an engine braking range. When this ratio reaches a target value, a control unit generates an ON signal. In response to this ON signal, an overrunning clutch solenoid is energized to engage the overrunning clutch.

REFERENCES:
patent: 4680992 (1987-07-01), Hayasaki et al.
patent: 4730521 (1988-03-01), Hayasaki et al.
patent: 4742732 (1988-05-01), Hiramatsa
patent: 4753134 (1988-06-01), Hayasaki
patent: 4787258 (1988-11-01), Yamamoto et al.
patent: 5012698 (1991-05-01), Hayasaki
patent: 5022286 (1991-06-01), Takizawa
patent: 5033330 (1991-07-01), Okahara
patent: 5038636 (1991-08-01), Vukovich et al.
Service Manual (publication No. A261C07) entitled "Nissan Full Range Electronically Controlled Automatic Transmission RE4R01A Type", published by Nissan Motor Company Limited in Mar. 1987.

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