Patent ID: 6691603
Filing Date: 2004-02-17
Classification: E02F,F15B

Abstract:
A fluid control system operative to control movement of at least one implement, the fluid control system comprising:a pump; a tank; an actuator including a working chamber and a non-working chamber; a valve assembly configured to control fluid communication between at least one of the working chamber and the tank, the working chamber and the pump, the non-working chamber and the tank, and the non-working chamber and the pump; an input device operative to selectively control movement of the at least one implement; and a controller in communication with the valve assembly and the input device, the controller being configured to control a flow condition of the working chamber as a function of a working chamber pressure difference determined by comparing a pressure condition of the working chamber with a desired working pressure of the working chamber, and to control a flow condition from the non-working chamber to the tank as a function of a non-working chamber pressure difference determined by comparing a pressure condition of the non-working chamber with a desired pressure of the non-working chamber.