CO₂ Emission from Gasoline Vehicle of Running Mode

Abstract

For CO₂ as global warming substance, emission factor of gasoline vehicle was calculated under running mode and compared with theoretical value of TRIAS, and yearly trend of CO₂ emission in Japan was calculated from emission factor and statistical gasoline marketing amount data.
CO₂ amount (TRIAS)-emitted gasoline vehicle (emission factor) is 2.38 kg/l, but the factor calculated from exhaust gas analytical value of actual running mode was 2.32 kg/l (constant speed running mode; 2.35 kg/l), affected by CO, HC and particulates in exhaust gas. CO₂ emission showed the lowestvalue at vehicle speed about 50 km/h and showed the higher value at lower speed side and higher speed side.
CO₂ total emission from gasoline vehicle in Japan was calculated as 89, 293×10³ ton in 1987 and it showed the small increase almost every year. Increasing ratio of a year was about 3-9% in 1971 to 1978 and about 2% in 1979 to 1987.