Modeling and Experimental Study on Evaporation of Vehicle Fuel Tank

In the existing evaporation emission control and monitoring system, it is still necessary to popularize and develop more suitable evaporation emission monitoring, diagnosis and control methods. This study developed a design for the control system of evaporative emissions in hybrid vehicles, focusing on monitoring and controlling fuel evaporative emissions. A fuel evaporation model for automotive fuel tank was established. In this study, the key component of vehicle evaporative emission system, the fuel tank, is modeled and simulated. Through 6-hour and 12-hour experimental studies on fuel evaporation characteristics inside the tank, measurements were taken to determine the amount of evaporation under different liquid levels, temperatures, and vibration states. When the temperature increased from 12°C to 17°C and then further to 28°C, the rate of fuel evaporation increased by 25% and 50%, respectively. The increase in temperature significantly enhanced the rate of evaporation. A detailed simulation model for fuel evaporation was established by studying its composition as well as characteristics specific to different types of fuels. This allowed for the prediction of both components present during evaporation as well as their respective quantities. The average accuracy of evaporation model is 92.7%. providing a foundation for the subsequent development of carbon canister adsorption models.