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김성열(Sungyeol Kim),강준한(Junhan Kang),김환국(Hwangook Kim),김상진(Sangjin Kim),손호제(Hoje Shon) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Front wheel based electronically controlled four wheel drive system has long been adopted in SUV vehicles to cope with fuel efficiency and cost effectiveness as well as powerful traction on various terrain. Most of FF based 4WD vehicles does not have center differential system and this configuration results in complicated torque distribution behavior between front and rear wheel. On this study, we investigated torque transferring effect by non-center differential 4WD system coming from tire radius difference and steered wheel path differences between front and rear axles. We built 4WD simulation model including driveline vibration and torque distribution behavior. We analyzed tip-in/out shock in 4WD system using dynamic simulation and suggested proper control strategies to minimize the shock and finally we tested the 4WD control strategy in real vehicle.