School of Automobile and Transportation Xihua University Chengdu 610039 China;
School of Automobile and Transportation Xihua University Chengdu 610039 China;
School of Automobile and Transportation Xihua University Chengdu 610039 China;
School of Automobile and Transportation Xihua University Chengdu 610039 China;
Fuel additives; Idle method; Pollutant emissions; Vehicles;