×

Hydraulics management for bounded implements

  • US 7,748,279 B2
  • Filed: 09/28/2007
  • Issued: 07/06/2010
  • Est. Priority Date: 09/28/2007
  • Status: Expired due to Fees
First Claim
Patent Images

1. A machine controller for controlling a flow of hydraulic fluid to each of two actuators associated with a machine, wherein one of the actuators is a bounded actuator, the fluid flow of which is constrained to remain between an upper and lower bound, and a non-bounded actuator, the controller comprising:

  • a control input for receiving operator commands related to desired bounded and non-bounded actuator movements;

    a translation module for translating the operator commands into a first valve control command associated with the bounded actuator and a second valve control command associated with the non-bounded actuator; and

    a balancing module configured to reduce the first valve control command to form a first adjusted valve control command if an available flow of hydraulic fluid is insufficient to service the first and second valve control commands, and if the difference between the available flow and a flow associated with the second valve control command is less than a flow corresponding to the first valve control command, wherein the first adjusted valve control command is the lesser of the first valve control command and a nonlinear threshold function of machine engine speed.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×