Patent ID: 7871348

Claim:
A hybrid powertrain system for a vehicle including an energy storage unit, a primary driveline assembly and a secondary driveline assembly, the system comprising: a power transfer box for transferring mechanical power between the primary and secondary driveline assemblies; a first electric machine configured to selectively (i) provide motive power to at least one of the primary driveline assembly and the secondary driveline assembly via the power transfer box by converting electrical power to motive power, (ii) receive motive power from at least one of the primary driveline assembly and the secondary driveline assembly by converting motive power to electrical power, and (iii) free spin; and a second electric machine configured to selectively (i) provide motive power to at least one of the primary driveline assembly and the secondary driveline assembly by converting electrical power to motive power, (ii) receive motive power from at least one of the primary driveline assembly and the secondary driveline assembly by converting motive power to electrical power, and (iii) free spin.