A Study on Adaptive Cruise Control Algorithm in Hybrid Vehicle for Fuel Economy Improvement

??? ??????????????? ??????????????? ????????? ?????? ????????? ?????? ????????? ?????? ?????? ??????????????? ?????? ????????? ?????????. ??????, ????????? ??????, ??????????????? ?????? ?????? ????????? ?????? ???????????? ??????. ?????? ?????? ???????????? ???????????? ?????? ?????? ?????????, ??????????????? ????????? , ???????????? ??????????????? ?????????????????? ????????? ?????? ?????????. ?????? ???????????? ????????? ?????? ????????? ????????? ?????? ????????? ??????????????? ????????? ?????? ?????????. ??? ?????? ???????????? ????????? ????????? ?????? ?????? (Adaptive Cruise Control) ???????????????. ?????? ??????????????? ????????? ACC ???????????? ?????? ????????? ?????? ???????????? ?????? ??????????????? ????????????. ?????? ??? ????????? ??????????????? ????????? ???????????? ???????????? ACC???????????? ???????????? ??????????????? ?????? ??????????????? ?????? ?????????. ACC ???????????? ????????? 3????????? ????????? ????????? ??????????????? ????????????. ????????? ????????? ???????????? ?????? Free Cruise Control ??????????????? ??? ???????????? ???????????? ??????????????? ?????? ??????????????? CSA(Curve-Speed-Assistance), ???????????? ?????? ??????????????? SSA(Slope-Speed-Assistance) ??? ???????????????. ????????? ????????? ????????? ?????? Transient Control ??????????????? ?????? ????????? ?????? ?????? ?????? ?????? ??????????????? ????????????. ????????? ????????? ??????????????? ???????????? ???????????? Following Control ??????????????? ??????????????? ???????????? ?????? ?????? ????????? ???????????? ?????? ??????????????? ???????????? ?????? ??????????????? ????????? Matlab/Simulink????? ???????????????, ????????? ??????????????? ?????? ?????? ????????? ???????????????.This paper deals with algorithm Adaptive Cruise Control Algorithm in Hybrid Vehicle for Fuel Economy Improvement. Recently, fuel efficiency regulations are reinforced due to depletion of resources and environmental problems. In order to overcome these difficulties, development of ???Green Vehicle??? such as hybrid vehicle and electric vehicle is actively underway. In addition, various driver assistance system technologies are actively developed for the convenience of the driver. A representative technique is adaptive cruise control system. Therefore, integrated control strategy of hybrid vehicle and driver assistance system such ACC system is needed. This paper will deal with control strategy for fuel economy improvement based on hybrid vehicle regenerative braking system and ACC system. The situation of the ACC system is divided into three and each control strategy is introduced. In the Free Cruise Control mode where no vehicle is detected in the forward direction, Curve-Speed-Assistance (CSA) for curved roads and Slope-Speed-Assistance (SSA) for sloped roads are proposed for based on map data. In transient control mode when the vehicle is detected in the front, the forward vehicle approach speed for fuel economy improvement is suggested. In the following control mode following the vehicle in front, it leads to improvement of fuel efficiency by lowering the responsiveness of follow-up performance. The simulation environment for the verification of the control algorithm was constructed with Matlab / Simulink??, and various scenarios confirmed the fuel efficiency improvement..Maste