Patent ID: 8640452

Claim:
Hydraulic fluid circuit for a torque transmission device, comprising: a first hydraulic circuit segment fluidly decoupled from a second hydraulic circuit segment; a hydraulic pump comprising a first fluidic pumping element and a second fluidic pumping element, the first and second fluidic pumping elements comprising positive-displacement pumping elements having a common characteristic flow curve; the first fluidic pumping element configured to fluidly communicate with the first hydraulic circuit segment; the second fluidic pumping element configured to fluidly communicate with the second hydraulic circuit segment; a first power source and a second power source selectively rotatably coupled to the first and second fluidic pumping elements; and the first fluidic pumping element controllable to a first pump operating point of the common characteristic flow curve to fluidly communicate a hydraulic flow stream at a volumetric flowrate sufficient to achieve cooling and lubricating functions in the first hydraulic circuit segment coincident with the second fluidic pumping element controllable to a second pump operating point of the common characteristic flow curve to fluidly communicate a hydraulic flow stream at a hydraulic pressure sufficient to achieve activation of clutches in the second hydraulic circuit segment.