Powertrain configuration design for two mode power split hybrid electric vehicle

Area of Science:

• Automotive Engineering
• Mechanical Engineering
• Powertrain Systems

Background:

• Hybrid transmissions are crucial for energy saving and emission reduction in the automotive industry.
• Developing efficient and versatile hybrid transmission configurations is an ongoing research challenge.

Purpose of the Study:

• To present a new design methodology for two-mode power-split hybrid transmissions.
• To synthesize novel hybrid transmission configurations using simple planetary gear trains (PGTs).

Main Methods:

• Decomposition of hybrid transmission structures into two distinct substructures.
• Recombination of substructure outputs to form complete hybrid configurations.
• Integration of shifting elements to enable fixed gear modes, mimicking traditional automatic transmissions.

Main Results:

• A systematic method for designing hybrid transmissions based on PGTs was developed.
• 38 distinct hybrid transmission configurations were successfully synthesized.
• Kinematic analysis was performed on a novel configuration for future optimization.

Conclusions:

• The decomposition and recombination method offers a flexible approach to synthesizing complex hybrid transmissions.
• This methodology can be adapted to create hybrid transmissions with multiple PGTs and various operating modes.
• The developed configurations hold potential for advancing energy-efficient automotive powertrains.