Simulation verification and design guide for P1+P2 hybrid built-in damper system

Among the hybrid system methods, the TMED (Transmission mounted electric device) method is divided into the TMED-1 system driven by the existing mass-produced P0+P2 motor and the TMED-2 system driven by the P1+P2 motor. It is known that the TMED-2 method improves power and fuel efficiency by about 10% or more compared to the TMED-1 due to the intervention of the P1 motor, and that carbon emissions can be reduced due to the improvement of engine thermal efficiency. However, the TMED-2 system is a structure that replaces the P0 motor with the P1 motor to improve power performance and transmission efficiency. The P1 motor is disadvantageous in terms of mountability due to its longer overall length compared to the P0. To solve this problem, the existing external damper system was designed and shaped to be assembled into the inner space between the P1 and P2 motors (built-in damper system), thereby securing mountability. The main development item that our company is currently researching is the TMED-2 embedded damper system mentioned above. We confirmed that the tendencies of the torsional test evaluation results and the analysis results are similar, and through this, we verified the finite element model. Using the verified finite element model, the reliability of the CAE analysis evaluation for the embedded damper system was secured. However, in the absence of a design guide, there is still concern about fatigue durability failure according to the design specifications for each component. In order to resolve this concern, a design guideline is needed that can increase fatigue durability performance by minimizing the structural analysis stress for the component. For this reason, this study utilized the Design of Experiments Method (DOE) to confirm the significant influence of the design specifications for each component, and to present a design guideline.