Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Construction or agricultural-type vehicle
Reexamination Certificate
2011-07-12
2011-07-12
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Construction or agricultural-type vehicle
Reexamination Certificate
active
07979182
ABSTRACT:
A swing drive system for a construction machine enhances safety for an operator. A swing control means55A has a lever input amount-torque table11and an actual rotating speed-torque table13. Based on a lever input amount and an actual rotating speed of an electric motor, the tables are used to derive torque values. A minimum value of the torque values is taken as the acceleration torque. The swing control means55A further has a lever input amount-meter-out restriction area table15and an actual rotating speed-relief torque table119. Based on the lever input amount and the actual rotating speed of the electric motor, a meter-out restriction area is derived from the lever input amount-meter-out restriction area table and the actual rotating speed to calculate a meter-out torque. A minimum value of the meter-out torque and relief torque is taken as the braking torque.
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Ochiai Masami
Ooki Takatoshi
Tanaka Atsushi
Watanabe Yutaka
Beaulieu Yonel
Hitachi Construction Machinery Co. Ltd.
Mattingly & Malur, P.C.
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