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首页> 外文会议>Automotive Fuel Containment Conference 2000 May 26, 2000 Birmingham, UK >Permeation and Stress Relaxation Testing of Fuel Seal Materials; A Comparison of Fuel System Elastomers
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Permeation and Stress Relaxation Testing of Fuel Seal Materials; A Comparison of Fuel System Elastomers

机译：燃油密封材料的渗透和应力松弛测试；燃料系统弹性体的比较

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The subject of fuel permeation has been thoroughly investigated and documented in several SAE and industry technical papers. Most of these papers deal with fuel permeation through items such as fuel tanks, and plastic and rubber fuel and filler hose. With ultra low emissions regulations coming on board, such as those from California (CARB) in 204 dictating no more than 0.5 g/day of hydrocarbon loss, one area of emissions that has not been documented well is permeation through the rubber seals used in the fuel system. In the past, permeation and micro leaks through seals had not been a significant source of fuel emissions, but the new regulations require attention to detail in all areas of sealing a fuel system. Seals will need to resist permeation, and will need to retain their sealing force over long periods of time. To investigate this phenomenon, DuPont Dow Elastomers Akron lab took permeation cups, ASTM E96-66 test method, and retrofitted the cups with stainless steel lids. Then gaskets based on different fuel handling elastomers were used to seal the steel lid against the body of the cup to see if fuel permeation through the seal could be detected. In addition to testing permeation through seals, stress relaxation in hot fuel was run on some of the same elastomers. Both fuel losses through seals and retained sealing force measurements will be presented in this paper.
机译：燃油渗透性的主题已在几篇SAE和行业技术论文中进行了详尽的调查和记录。这些论文大多数涉及通过油箱，塑料和橡胶燃料以及加油软管等物品的燃油渗透。随着即将实行的超低排放法规，例如加利福尼亚州（CARB）在204年颁布的法规规定每天不超过0.5 g的碳氢化合物流失，其中一个尚未被充分记录的排放领域是通过橡胶密封件的渗透。燃油系统。过去，通过密封件的渗透和微小泄漏并不是燃料排放的重要来源，但是新法规要求在密封燃料系统的所有领域中都应注意细节。密封件需要抵抗渗透，并且需要长时间保持密封力。为了研究这种现象，杜邦陶氏弹性体公司阿克伦实验室采用了渗透杯，ASTM E96-66测试方法，并在杯子上加装了不锈钢盖。然后使用基于不同燃料处理弹性体的垫圈将钢盖密封在杯体上，以查看是否可以检测到燃料通过密封件的渗透。除了测试通过密封的渗透性外，还对某些相同的弹性体进行了热燃料中的应力松弛测试。本文将介绍通过密封件的燃油损失和保留的密封力的测量结果。

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