Swing drive system for construction machine

Details Swing drive system for construction machine Swing drive system for construction machine

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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patent: 2002-265187 (2002-09-01), None
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