Patent ID: 8456046

Claim:
An electric machine module comprising: an electric machine including a rotor; a housing enclosing the electric machine within a machine cavity and including at least one end cap positioned axially adjacent to the electric machine; wherein the housing includes a sleeve member generally circumscribing the electric machine and coupled to the at least one end cap; and wherein the sleeve member includes a coolant jacket configured and arranged to contain liquid coolant; and wherein the sleeve member further comprises coolant apertures wherein an exit of the coolant apertures is configured and arranged to direct the liquid coolant substantially toward a rotational axis of the rotor; and wherein the coolant apertures are in fluid communication with the coolant jacket configured and arranged to disperse a portion of the liquid coolant substantially unpressurized and under gravity flow from the coolant jacket substantially towards the machine cavity; the at least one end cap including a shroud protruding into the machine cavity; and the shroud including a step with one of a constant-angled and a variable-angled rotor feed path, the step being configured and arranged to guide a portion of the liquid coolant toward the rotor substantially unpressurized and under gravity flow to at least partially wet the rotor with the liquid coolant.