Patent ID: 8838314

Claim:
A vehicle having a hybrid-electric powertrain comprising: an internal combustion engine; an electric motor and generator connected to the internal combustion engine; a power take off unit selectively driven by the electric motor and generator; a first hydraulic circuit having a first hydraulic pump being mechanically connected to the power take off unit and being driven by the power take off unit; a second hydraulic circuit having a second hydraulic pump being mechanically connected to the power take off unit and being driven by the power take off unit; a combination valve disposed in fluid communication with the first hydraulic circuit and the second hydraulic circuit, the combination valve having a first open position adapted to allow fluid to flow from the second hydraulic circuit to the first hydraulic circuit and a closed position adapted to prevent fluid flow from the first hydraulic circuit to the second hydraulic circuit; a solenoid connected to the combination valve, the solenoid positioning the combination valve between the first open position and the closed position; an electronic system controller in electrical communication with the solenoid, the electronic system controller generating a control output to the solenoid to position the combination valve; wherein the electronic system controller monitors a torque requirement of the first hydraulic circuit and a torque requirement of the second hydraulic circuit and generates a control output to position the combination valve in the first open position when the torque requirement of the first hydraulic circuit exceeds a first set point, and generates a control output to position the combination valve in the closed position when the torque requirement of the first hydraulic circuit falls below a second set point, the first set point and the second set point being based on an adaptive learning strategy, the electronic system controller further utilizing a throttle input to generate an anticipated torque demand and adjustinq the control output in response to the anticipated torque demand, the torque requirement of the first hydraulic circuit, and the torque requirement of the second hydraulic circuit.