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Road Report

机译:道路报告

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摘要

For the last month or so I feel like I've been living the lyrics of Willie Nelson's song "On the Road Again," as travel has increased substantially. I found a visit with Volvo's diesel engineers and the company's engine manufacturing factory particularly interesting. Recall most U.S. engine suppliers met the most recent emissions regulations by using some kind of exhaust gas recirculation (EGR) in which a small portion of the engine's exhaust was cooled and reintroduced into the engine's combustion chambers to lower the temperature within the chamber thereby reducing oxides of nitrogen. The technology works quite well—better, in fact, than most fleet managers expected it might. The two major drawbacks are higher initial cost and decreased fuel economy.
机译:在过去的一个月左右的时间里,我觉得自己一直生活在威利·纳尔逊(Willie Nelson)的歌曲“ On the Road Again”中的歌词中,随着旅行的增加。我发现拜访沃尔沃的柴油工程师和该公司的发动机制造厂特别有趣。回想一下,大多数美国发动机供应商都通过使用某种废气再循环(EGR)来满足最新的排放法规,其中一小部分发动机废气被冷却并重新引入发动机的燃烧室以降低燃烧室内的温度,从而减少氧化物氮该技术效果很好-实际上,它比大多数车队经理预期的要好。两个主要缺点是较高的初始成本和降低的燃油经济性。

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