Patent ID: 8453783

Claim:
A load sensing hydraulic control system for use with a vehicle including a frame, a plurality of traction devices configured to propel the frame on the ground, a plurality of hydraulic actuators, a variable displacement pump including a pump displacement controller receiving a pump control signal, the variable displacement pump being in fluid communication with the plurality of hydraulic actuators through a discharge passage, and a load sense system providing a maximum pressure signal indicative of the maximum pressure needed by the plurality of hydraulic actuators during operation of the vehicle, the load sensing hydraulic control system comprising: an orifice receiving the maximum pressure signal, the orifice being in fluid communication with the pump displacement controller, a check valve receiving the maximum pressure signal and bypassing the orifice when the maximum pressure signal is greater than the pump control signal, and a load sense regulator in fluid communication with the pump displacement controller, the load sense regulator maintaining a pressure differential over the orifice below a predetermined level.