전동 수퍼차저 장착 48V 마일드 하이브리드 차량의 과급 특성을 고려한 동력분배 최적화

초록

Recently, as global emission regulation is reinforced, researches about efficiency of powertrain like hybrid system and engine downsizing have been studied to improve fuel efficiency. Especially, various researches about 48V mild hybrid system are studied and the application of electric supercharger to the 48V mild hybrid system is also considered as a solution of insufficient engine power occurred by engine downsizing. However, an excessive operation of the electric supercharger could require additional charge of a battery causing fuel efficiency decrement. Therefore, the optimization process between improvement of powertrain performance and fuel efficiency is necessary. To solve this problem, Dynamic Programming is used as an optimization method of power distribution in the electric supercharger applied P0 type 48V mild hybrid vehicle.