Patent ID: 8397690

Claim:
A lubrication system configured to provide pressurized oil to an engine, the lubrication system comprising: a rotary pump fluidly connected to an eductor such that oil flows from the eductor to the rotary pump; wherein the rotary pump is configured to supply pressurized oil to the engine; wherein the rotary pump includes a primary input port and a supply port; a primary suction line fluidly connected to the primary input port and configured to draw oil from a sump of the engine; an eductor in fluid communication with the primary suction line such that oil flowing through the primary suction line also flows through the eductor; an oil output line fluidly connected to the supply port of the rotary pump and configured to provide the pressurized oil from the rotary pump to the engine; a supplemental supply line selectively fluidly connecting the oil output line and the eductor such that pressurized oil selectively flows through the supplemental supply line and into the eductor; a solenoid valve movable between a first position and a second position; wherein the solenoid valve supplies a fluid signal that allows pressurized oil to flow from the supplemental supply line and into the eductor when the solenoid valve is in the first position such that the volume of oil flowing from the sump and through the eductor to the rotary pump is increased; wherein the solenoid valve does not supply a fluid signal and pressurized oil is prevented from entering the eductor from the supplemental supply line when the solenoid valve is in the second position such that the volume of oil flowing from the sump and through the eductor to the rotary pump is not increased.