Modeling and Analysis of Onboard Refueling Vapor Evaporative Emission for Hybrid Electric Vehicle

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Hao Ding ◽  
Ren He ◽  
Xiaoxi Deng
Keyword(s):  
Mathematical Model ◽  
Electric Vehicle ◽  
Time Variation ◽  
Hybrid Electric Vehicle ◽  
Diffusion Theory ◽  
Fuel Vapor ◽  
Test Results ◽  
Binary Diffusion ◽  
Modeling And Analysis ◽  
Hybrid Electric

Fuel vapor-containment system (FVS) is a kind of vapor recovery device in the hybrid electric vehicle (HEV) and has a great advantage on the fuel vapor recovery. The general refueling progress of the FVS has been studied in detail and divided into two different stages: the decompression stage and the refueling stage. Then, the two different stages' mathematical models have been developed based on the binary diffusion theory and time-variation diffusion theory, and simulated using matlab to calculate the evaporative emission with regard to time. Finally, the author has made the experiments on the decompression emissions and refueling emissions. The analysis shows that the test results are well coincided with the evaluation of mathematical model.

Models and Analysis of the Pressure Field for a Hybrid Electric Vehicle With a Fuel Vapor-Containment System in a Refueling Process

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Yanyue Fang ◽  
Ren He ◽  
Baowei Fan
Keyword(s):  
Vapor Pressure ◽  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Pressure Field ◽  
Numerical Models ◽  
Pressure Change ◽  
Pipe Diameter ◽  
Fuel Vapor ◽  
Containment System ◽  
Hybrid Electric

In order to ensure and improve the performance of the fuel vapor-containment system (FVS) on a hybrid electric vehicle (HEV), the vapor pressure field of the evaporative (EVAP) system in the refueling process was analyzed. Numerical models were established to describe the pressure change in the EVAP system. Based on these numerical models, the influences of refueling speed, filler pipe diameter, vent pipe diameter, and fuel vapor-containment valve (FVV) port diameter on pressure change were discussed. The numerical models and the influences of aforementioned effects were validated by experiments. Simulation and experimental results indicated that the vapor pressure field in the EVAP system is more susceptible to the change of refueling speed and FVV port diameter. If the refueling speed increased and the FVV port diameter decreased, the vapor pressure in the EVAP system strongly fluctuated. Furthermore, results also show that the FVV port diameter should be as large as possible but less than 20 mm, while refueling speed should be 50 l/min. The filler pipe diameter can be chosen in the range of 23–28 mm.

Design of A Fuel Vapor-containment System (FVS) to Meet Zero Evaporative Emissions Requirements in a Hybrid Electric Vehicle

2005 ◽  
Author(s):  
Yojiro Iriyama ◽  
Masahide Kobayashi ◽  
Takuji Matsubara ◽  
Yuusaku Nishimura ◽  
Ryosuke Nomura ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Fuel Vapor ◽  
Evaporative Emissions ◽  
Containment System ◽  
Hybrid Electric
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