Interrelated power delivery controls – including engine control – Clutch control – Condition responsive control
Reexamination Certificate
2005-09-20
2005-09-20
Estremsky, Sherry (Department: 3681)
Interrelated power delivery controls, including engine control
Clutch control
Condition responsive control
C477S180000, C701S069000
Reexamination Certificate
active
06945909
ABSTRACT:
A torque distribution control device for a four-wheel drive vehicle having a torque distribution device for distributing the drive power transmitted from an engine to either of the front wheels or the rear wheels as prime drive wheels, to other wheels as sub-drive wheels determines a pre-torque in a feed forward sense based on the vehicle speed, the throttle opening degree and the gear shift step of a transmission. A compensation torque is determined in a feedback sense based on the vehicle speed and the rotational speed difference between the drive wheels and the sub-drive wheels. A torque transmission clutch is controlled based on a command torque which is obtained by the addition of the pre-torque and the compensation torque, so that the command torque is distributed to the sub-drive wheels.
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patent: 5069305 (1991-12-01), Kobayashi
patent: 5448478 (1995-09-01), Eto
patent: 6347271 (2002-02-01), Showalter
patent: 6553303 (2003-04-01), Matsuno
patent: 6697725 (2004-02-01), Williams
patent: 6834225 (2004-12-01), Jiang et al.
patent: 2001-71781 (2001-03-01), None
Estremsky Sherry
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Toyoda Koki Kabushiki Kaisha
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