METHOD FOR CONTROLLING HYDRAULIC LINE PRESSURE FOR COMPONENT LUBRICATION IN AN ELECTROMECHANICAL TRANSMISSION

摘要

A method for controlling hydraulic line pressure for component lubrication in a transmission includes monitoring a speed of an engine and an electric machine, determining a minimum line pressure required to lubricate the engine based upon the speed of the engine, determining a minimum line pressure required to lubricate the electric machine based upon the speed of the electric machine, controlling a minimum line pressure of a hydraulic control system to at least satisfy a larger value of the minimum line pressures.