HYDRAULIC CONTROL SYSTEM FOR MACHINE

摘要

A hydraulic control system for a machine is disclosed. The hydraulic control system includes a pump configured to pressurize a fluid, and a swing motor selectively driven by pressurized fluid from the pump. The swing motor is configured to move a part of the machine. The hydraulic control system also includes a controller in communication with the pump. The controller is configured to receive an input indicative of a difference between a desired speed and an actual speed of the swing motor, and determine if the swing motor is accelerating, decelerating, or operating at neutral mode. The controller is configured to determine an amount of return fluid from an actuator of the machine that is available as makeup fluid for the swing motor if the swing motor is operating at neutral mode. The controller is configured to control the pump based on at least the amount of return fluid.

主权项

1. A hydraulic control system, comprising:
a pump configured to pressurize a fluid; a swing motor selectively driven by pressurized fluid from the pump, the swing motor configured to move a part of a machine; and a controller in communication with the pump, the controller being configured to:
receive an input indicative of a difference between a desired speed and an actual speed of the swing motor;determine if the swing motor is accelerating, decelerating, or operating at a neutral mode based on the difference between the desired and actual speeds;determine an amount of return fluid from an actuator of the machine that is available as makeup fluid for the swing motor if the swing motor is operating at constant speed;receive an input indicative of a swing speed of the part of the machine; andcontrol the pump based on at least the swing speed and the amount of return fluid.