Abstract: An electric motor comprises: a stator, a rotor comprising: a rotor shaft having a hollow interior and configured for rotation inside the stator about a rotor axis, the rotor shaft having at least one inlet into the hollow interior and at least one radial outlet from the hollow interior, and a rotor body and an endring at an end of the rotor body along the rotor axis; and a spacer forming an internal cavity to receive fluid from the hollow interior, the spacer having an outlet from the internal cavity.

Abstract: An oil pan is attached to a motor to form an oil sump. An oil sump can have one or more valves. Oil can buoy a rotatably mounted valve member into a closed position, and gravity can rotate the valve into an open position. A valve can have a stadium shape. Valves can be placed symmetrically or asymmetrically with regard to a forward-reverse travel direction axis or to a left-right lateral acceleration axis. A bulbous portion of a valve member can enclose an air cavity and can extend into a valve opening. A valve can be placed at an oil pickup, wherein oil can buoy the valve to an open position and otherwise the valve member can be rotated to a closed position.

Abstract: A motor for a vehicle comprises: a motor housing; an oil sump mounted to the motor for oil to drain from the motor housing into the oil sump, a width of the oil sump being greater than a depth of the oil sump, the oil sump having an oil pickup for circulating the oil; and a valve member mounted at a pivot point inside the oil sump, the valve member enclosing an air cavity for buoyancy, wherein the valve member is configured to rotate about the pivot point due to being buoyed by the oil.

Abstract: A motor for a vehicle comprises: a motor housing; an oil sump mounted to the motor for oil to drain from the motor housing into the oil sump, a width of the oil sump being greater than a depth of the oil sump, the oil sump having an oil pickup for circulating the oil; and a valve member mounted at a pivot point inside the oil sump, the valve member enclosing an air cavity for buoyancy, wherein the valve member is configured to rotate about the pivot point due to being buoyed by the oil.