Patent ID: 8340875

Claim:
A hydraulic system, comprising: a pump configured to pressurize fluid; a lift actuator; a lift valve arrangement configured to meter pressurized fluid from the pump into the lift actuator to lift a work tool; a lift sensor associated with the lift actuator and configured to generate a first signal indicative of an actual lift velocity of the work tool; a tilt actuator; a tilt valve arrangement configured to meter pressurized fluid from the pump into the tilt actuator to tilt the work tool; at least one operator interface device movable by an operator to generate a second signal indicative of a desired lift velocity of the work tool, and a third signal indicative of desired tilt velocity of the work tool; and a controller in communication with the lift valve arrangement, the lift sensor, the tilt valve arrangement, and the at least one operator interface device, the controller being configured to: command the lift valve arrangement to meter pressurized fluid into the lift actuator based on the second signal; command the tilt valve arrangement to meter pressurized fluid into the tilt actuator based on the third signal; and command the tilt valve arrangement to meter pressurized fluid into the tilt actuator and maintain a desired tilt angle of the work tool during lifting based selectively on the first and second signals.