The effect of start-stop systems on scooter exhaust emissions

• Published in: Transportation research. Part D, Transport and environment Vol. 91; p. 102684
• Main Authors: Lijewski, Piotr, Szymlet, Natalia, Fuć, Paweł, Domowicz, Andrzej, Rymaniak, Łukasz
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2021
• Subjects: Real driving emissions; Scooter; Scooter; Real driving emissions
• ISSN: 1361-9209; 1879-2340
• DOI: 10.1016/j.trd.2020.102684

•Exhaust emissions measurement of CO2, CO, HC and NOx from scooter with start stop system in real operating conditions.•RDE measurement of two-wheeled vehicles in urban cycle of high congestion.•The operating conditions of the cycles and the exhaust emissions in real operating conditions have been compared.•The influence of the scooter start-stop system on the exhaust emissions in real operating conditions. The paper describes the analyses of the exhaust emissions from a city scooter performed under actual operating conditions. The measurements of the exhaust emissions were performed for CO2/fuel consumption, CO, HC and NOx. The investigations were carried out in actual traffic of high congestion in Poznan (Poland) in a driving cycle of the length of 7.35 km. The analyses were performed on a scooter fitted with a 125 cc engine with a start-stop system. The performed analyses revealed that the actual emissions of CO and HC were greater by 57% and 4%, respectively for the scooter with the start-stop system enabled, while the emission of NOx decreased by 10%. The application of the start-stop system contributed to the reduction of the fuel consumption/CO2 emission by approx. 12%. Large differences between the emission in real operating conditions and the Euro 4 emission standards have been obtained.