Patent ID: 8826654

Claim:
A hydraulic fluid system for a mobile machine, comprising: a closed loop hydraulic fan circuit, the hydraulic fan circuit including a primary pump, a motor fluidly connected to the primary pump, a fan driven by the motor a supply passage extending from the primary pump to the motor, a return passage extending from the motor to the primary pump, and a first accumulator selectively fluidly connected to at least one of the supply and return passages via a charge valve; at least one open loop hydraulic circuit fluidly connected to the first accumulator; and a directional control valve configured to control a flow direction associated with the supply and return passages, the directional control valve directing fluid to flow either from the primary pump through the supply passage in a forward direction, or from the primary pump through the return passage in a reverse direction, wherein the charge valve is moveable between a first position directing fluid flowing in the forward direction from the first accumulator to the return passage, and a second position directing fluid flowing in the forward direction from the supply passage to the first accumulator.