CO2 Real Drive Emission Characteristics of CNG and Gasoline Dual Fuel Vehicle at Plateau

MA Zhilei; HE Chao; LIU Ming; ZOU Lang; ZHANG Rongzhu

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (6) : 71-77.

CO₂ Real Drive Emission Characteristics of CNG and Gasoline Dual Fuel Vehicle at Plateau

MA Zhilei,HE Chao,LIU Ming,ZOU Lang,ZHANG Rongzhu

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Abstract

In order to study the greenhouse gas CO2 emission characteristics of dual fuel vehicle fueled with CNG and gasoline at plateau, the road driving emission tests were conducted in three cities with altitudes of 1 110 m, 1 330 m and 1 960 m and emissions data were then processed by using the moving average window method according to the real driving emission (RDE) test requirements. The results show that the CO₂ emission factor for CNG has a good linear relationship at the altitude of 1 100 m to 2 000 m, which increases by 3.38 g/km per 100 m and decreased by 20.33% on average compared with that of gasoline from the view of total distance. At low altitude, the response of load acceptance is faster with the throttle opening, but becomes slow with the increase of altitude. With the increase of vehicle speed within 50 km/h, the transmission ratio decreases and the number of engine work cycle per mileage decreases so that the CO₂ emission factor decreases with the increase of vehicle speed. The CO₂ emission factor increases mainly with the increase of load when the vehicle runs beyond 50 km/h.

Key words

dual fuel engine / portable emissions measurement system (PEMS) / carbon dinoxide / emission factor / moving average window method

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MA Zhilei,HE Chao,LIU Ming,ZOU Lang,ZHANG Rongzhu. CO₂ Real Drive Emission Characteristics of CNG and Gasoline Dual Fuel Vehicle at Plateau[J]. Vehicle Engine. 2019, 0(6): 71-77