Fuel Efficiency and $CO_2$ Emission Characteristics on Driving Cycle Mode and Ignition Advance Condition Change of CNG/LPLI Bi-Fuel Vehicle

Abstract Due to persist of high oil prices, LPG price stabilization and CNG modification project will be conducted. Present studydescribes the fuel efficiency and CO 2 emission characteristics on driving cycle mode and ignition advance condition changeof CNG/LPG Bi-Fuel vehicle. In case of LPG Base and CNG Base condition, considerable CO 2 emissions are generatedwithin range of high acceleration on FTP-75 and HWFET driving mode. However previous phenomena does not appear inCNG fuel 10 o CA and 15 o CA spark advance condition. As a result of analyzing the experimental data CNG S/A10 o CA, CNGS/A15 o CA, CNG Base, and LPG Base sequentially measured high fuel economy and low CO 2 emission characteristics. 1.     ! "# $%&'( )*+, - ./012 3 45 , 678( 9:;1" ? @ A 6B 6CDE " ? %NO PQ RS LPG( )( HT 10UV WXY Z [:\ ] 54.8%^ 3O_M . `a -bK cOd LPG Z ef= CNG gh%" @ H>? ij R Mk %" l0 mfM