Experimental investigation on the exhaust emissions and performance of a hybrid electric motor coupled with an energy recovery system

Abstract

In developing countries, scooters and motorcycles are widely used for daily transportation, which emit a huge NOx, HC, CO, particle matter emissions, causing serious pollution as well as heath issues, such as coughs, itchy or burning eyes, and respiratory health problems. In this study, emissions characteristics and energy recovery efficiency of a scooter powered by a hybrid powertrain propulsion system were comprehensively investigated according to the standard test cycle. The results indicated that the NOx, HC, and CO emissions of the scooter powered by hybrid powertrain were 90.86%, 61.14% and 59.37% lower than those by pure gasoline engine. In addition, the energy recovery of the scooter powered by hybrid powertrain coupled with regenerative braking system was exceeded 0.45 kW by using the electric motor under the deceleration operating conditions. The energy recovery efficiency of the scooter powered by hybrid powertrain was 6.1%. Furthermore, the fuel consumption values per 100 km distance travelled by the scooter under the hybrid powertrain and pure gasoline engine were 2.202 L and 2.009 L, respectively, which corresponded to a fuel reduction rate of 8.76% for the scooter powered by hybrid powertrain propulsion system.

Keywords

• Transient exhaust emissions
• Hybrid scooter
• Fuel consumption
• Regenerative braking system
• Energy recovery