Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Reexamination Certificate
2006-08-01
2006-08-01
Bonck, Rodney H. (Department: 3681)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
C192S003300, C477S062000, C477S169000
Reexamination Certificate
active
07085640
ABSTRACT:
A tightening force of a lockup clutch (2) exerted between a pump impeller (1a) connected to an engine (21) and a turbine runner (1b) connected to an automatic transmission (23) is controlled by a controller (5). The controller (5) determines a target relative rotation speed of the pump impeller (1a) and the turbine runner (1b), and performs feedback control of the tightening force such that the difference between the target relative rotation speed and the real relative rotation speed is decreased. The controller (5) also performs feedforward control of the tightening force. When the variation of the relative rotation speed due to the feedforward control has exceeded the predetermined value, the controller (5) corrects the feedback control amount to moderate the effect of the variation, thereby suppressing sudden change in the tightening force.
REFERENCES:
patent: 4957194 (1990-09-01), Sawa et al.
patent: 5733223 (1998-03-01), Matsubara et al.
patent: 5749061 (1998-05-01), Kono et al.
patent: 6066072 (2000-05-01), Adachi
patent: 2002/0052265 (2002-05-01), Segawa et al.
patent: 2004/0082434 (2004-04-01), Segawa et al.
patent: 2004/0162184 (2004-08-01), Segawa et al.
patent: 1 201 971 (2002-05-01), None
Adachi Kazutaka
Segawa Satoshi
Bonck Rodney H.
Foley & Lardner LLP
Nissan Motor Co,. Ltd.
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