Control system for automatically controlling actuators of an exc

Details Control system for automatically controlling actuators of an exc Control system for automatically controlling actuators of an exc

1991-10-28

1994-11-01

Chin, Gary

Boots, shoes, and leggings

340686, 414699, 36416701, G06F 1520

Patent

active

053612116

ABSTRACT:
A control system for automatically controlling the operation of actuators of an excavator. The control system of the invention provides several advantages in that the travelling mode of the travelling motors is automatically changed between the first and second step travelling modes in order to efficiently correspond to the load imposed on the travelling motors depending on the ground surface condition, the brake mechanism for the swing motor section is controlled with an adjustable timing control, the synchronous operation of the swing motor and the boom cylinder is controlled by simply setting a relative actuating velocity therebetween, flow rate of hydraulic fluid from the main hydraulic pumps to each actuator is automatically controlled in case of handling the control levers/pedals for initiating the actuators or stopping the actuating of the actuators, flow rate of the hydraulic fluid for the cylinder actuators in order to drive the cylinder actuators without occurrence of shock at an end of cylinder of each cylinder actuator, a lifting operation of an excavator is adjustably controlled so as to prevent a tipping accident of the excavator.

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patent: 5160239 (1992-11-01), Allen et al.
patent: 5178510 (1993-01-01), Hanamoto et al.

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