The regulation for $CO_2$ emissions from vehicles have become much more stringent in recent years. These more stringent regulations request vehicle manufacturers to develop alternative fuels to reduce exhaust emissions. In this paper, $CO_2$ emission of gasoline, diesel and LPG vehicles in the CVS-75mode is analyzed. The experimental results indicated that the cold starting acceleration period of $CO_2$ emission was much longer compared to the hot start acceleration period. For example, gasoline vehicle and LPG fuel vehicle had 21% higher $CO_2$ emission and diesel vehicle had 34% higher $CO_2$ emission.
'Greenhouse Gas Emission from a Typical Passenger Vehicle,' EPA420-F-05-004, 2005
Vehicle Emission Standards Maual, SAE HS-2004
Y. S. Yoo, J. H. Ryu, M. D. Eom, M. S. Jeon, D. U. Kim and D. S. Kim, 'A Study on the Characteristics of Greenhouse Gas Exhausted from Gasoline Passenger Cars,' Spring Conference Proceedings, KSAE, pp.8-13, 2005
H. Lee, J. Ryu and Y. Kim, 'The Correlation Analysis of CO2 Emission and Fuel Economy for LPG Vehicles,' 30th Anniversary Conference Proceedings, KSAE, pp.613-618, 2008
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