| 초록 |
In a vehicle drive system, torsional vibration is caused by engine fluctuation torque transmitted to the rotor system. This torsional vibration causes NVH problems and affects the life of the vehicle. DMF system based on torsional stiffness and inertia provided an effective capacity of releasing irregular vibration rising from the engine and transmitting to the transmission. However, engine irregularities have become more serious as a result of downsizing and uptorquing. The DMF system based on stiffness and inertia has reached its limits. Therefore, it is deemed necessary to propose new systems. Centrifugal pendulum and its application in the automotive area is considered as a major breakthrough. They are capable of counteracting the applied torque fluctuations of a given frequency over a range of operating amplitude, which turns out to be an efficient tool for filtration. In this study, we have shown the behaviors of the DMF pendulum in front wheel driveline with a seven-speed dual wet-clutch transmission. We designed a driveline rotor model and analyzed the frequency vibration. The contribution analysis was performed on each design factor of DMF, pendulum, and driveline system. We also performed a vehicle test in order to validate the optimized DMF pendulum performance in the actual driving conditions of a vehicle. |
