Tokyo Denki University, 5, Senjyu-Asahicho, Adachi, Tokyo 120-8551, Japan.
National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
Sci Total Environ. 2018 May 1;622-623:467-473. doi: 10.1016/j.scitotenv.2017.11.339. Epub 2017 Dec 13.
The effects of Reid vapor pressure (RVP) on refueling emissions and the effects of ethanol 10% (E10) fuel on refueling and evaporative emissions were observed using six cars and seven fuels. The results indicated that refueling emissions can be reproduced by a simple theoretical model in which fuel vapor in the empty space in the tank is pushed out by the refueling process. In this model, the vapor pressures of fuels can be estimated by the Clausius-Clapeyron equation as a function of temperature. We also evaluated E10 fuel in terms of refueling and evaporative emissions, excluding the effect of contamination of ethanol in the canister. E10 fuel had no effect on the refueling emissions in cases without onboard refueling vapor recovery. E10 showed increased permeation emissions in evaporative emissions because of the high permeability of ethanol. And with E10 fuel, breakthrough emissions appeared earlier but broke through slower than normal fuel. Finally, canisters could store more fuel vapor with E10 fuel.
使用六辆汽车和七种燃料，观察雷德蒸气压（RVP）对加油排放的影响以及乙醇 10%（E10）燃料对加油和蒸发排放的影响。结果表明，加油排放可以通过一个简单的理论模型来再现，其中油箱中空余空间中的燃料蒸气被加油过程推出。在该模型中，燃料的蒸气压可以通过克劳修斯-克拉珀龙方程作为温度的函数来估算。我们还评估了 E10 燃料在加油和蒸发排放方面的情况，排除了罐中乙醇污染的影响。在没有车载加油蒸气回收的情况下，E10 燃料对加油排放没有影响。E10 由于乙醇的高渗透性，在蒸发排放中显示出增加的渗透排放。并且，使用 E10 燃料时，突破排放出现得更早，但突破速度比普通燃料慢。最后，E10 燃料的燃料箱可以储存更多的燃料蒸气。
