Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Patent
1995-12-28
1998-05-19
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
701 51, 701 68, 477120, 477 72, 477174, 192103F, G06G 770
Patent
active
057549699
ABSTRACT:
An automatic transmission system with a lock-up clutch for use with an engine includes an automatic transmission having an input shaft and an output shaft. A torque converter with a lock-up clutch is provided between the input shaft of the automatic transmission and an output shaft of the engine. A first device calculates a measure of time-domain variation in the rotational speed of the output shaft of the engine. A second device detects whether or not the measure of time-domain variation in the rotational speed of the output shaft of the engine exceeds a predetermined threshold value. A third device changes the condition of the lock up when the second device detects that the measure of time-domain variation exceeds the threshold value. A similar system is operable when the second device calculates a measure of time-domain variation in the rotational speed of the output shaft or the input shaft of the automatic transmission. A similar system is also operable when such measurements from the engine and the automatic transmission are combined.
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Ando Yoriaki
Hakamada Naoki
Louis-Jacques Jacques H.
Nippon Soken Inc.
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