Hybrid transmission systems including crankshaft integrated starter-generators

An electrified vehicle, comprising:

• an engine;
• a front module downstream from the engine;
• a crankshaft integrated starter-generator at least partially enclosed by a housing of the front module,
• wherein the crankshaft integrated starter-generator is operably connected to a crankshaft of the engine;
• a transmission gearbox aft of the front module;
• a torque converter located axially between the front module and the transmission gearbox;
• and
• a stud protruding from the torque converter and extending in an upstream direction toward the engine,
• wherein the stud interfaces with the crankshaft integrated starter-generator at a location that is radially inward from an electric machine of the crankshaft integrated starter-generator,
• wherein the crankshaft integrated starter-generator includes an integrated rotor carrier/input shaft assembly and the electric machine, and further wherein the integrated rotor carrier/input shaft assembly is a monolithic structure that includes a rotor carrier and an input shaft,
• wherein the input shaft of the integrated rotor carrier/input shaft assembly is a separate shaft from a transmission input shaft of the transmission gearbox.

A method, comprising:

• balancing a torque converter or a crankshaft integrated starter-generator of a transmission system;
• balancing the other of the torque converter and the crankshaft integrated starter-generator;
• aligning a first balancing marking of the torque converter with a second balancing marking of the crankshaft integrated starter-generator;
• and
• mechanically mounting together the torque converter and the crankshaft integrated starter-generator.