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原文：
Working with only a handful of people in his shop near Asbury Park, Mr. Coates has developed an engine head that uses rotary valves to manage the flow of gases into and out of combustion chambers, rather than the poppet valves used in virtually all cars produced now. Mr. Coates asserts that the rotary valves increase an engine's power and reduce emissions, and he has outfitted a 1984 Mercedes-Benz Globe Valves 280SE with one of his experimental six-cylinder engines. Over the years, it is true, other technologies have been tried. The Chrysler Corporation, for instance, had a small fleet of cars with turbine engines on the road in the early 1960's, but high manufacturing costs kept them from commercial introduction. The Mazda Motor Corporation commercialized the rotary-piston Wankel engine, which is small and powerful. But it is also something of a gasReducing Valves glutton, so it is offered only in one model, the RX-7 sports car. Each sphere is partly hollowed out to allow for gases to flow in and out during its rotation. The rest of the time in each cycle, the solid part of the ball closes off the combustion chamber by creating a seal against a carbon-ceramic valve seat, Mr. Coates said. The shafts that hold the valves spin on Filter bearings that Mr. Coates describes as being made of a ceramic-carbon-bronze material requiring no lubrication.
原文来自： http://www.nytimes.com/1992/08/12/business/business-technology-the-rotary-valve-engine-gets-another-look.html

BUSINESS TECHNOLOGY; The Rotary Valve Engine Gets Another Look;是由上海埃非凯阀门有限公司提供的阀门新闻，中文译文仅供参考(上海埃非凯阀门有限公司还生产液位计平衡阀过滤器针型阀锻钢阀门及电动调速蝶阀，气动通风蝶阀，美标波纹管闸阀，对夹式硬密封蝶阀，梳齿式调节蝶阀，欢迎您的选购。)
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译文：提升阀执行合理的费用
科茨先生说，如此装备可以运行冷却器一个引擎，因为阀门的酷脸被提交至燃烧室的燃料，而被点燃。这意味着低辛烷值的燃料可以使用，在传统的锥阀发动机，更高的辛烷值是需要防止在其与燃烧室热阀跟燃料过早点火。另一个旋转阀美德，科茨先生说，是它允许更高的压缩比，因为进入燃烧室，在那里会碰撞活塞上升，除非额外的空间被允许无阀突出。高达14至1的压缩比是可能的，他说，与8至1或9传统发动机为1。较高的压缩比意味着更多的权力可以由一个一定规模的发动机生产。旋转阀系统本身就比提升阀简单，科茨先生说，因为它消除了凸轮轴，需要打开和关闭阀门的所有部分，并需要定期调整它们。汽车工程师说旋转阀的设计已经存在差不多，只要汽车。一些早期的豪华轿车使用，因为他们比提升阀的安静，说丹尼斯Simanaitis，道路工程及轨道杂志，一个汽车爱好者的编辑。但是，旋转阀已普遍因废弃三个问题，Simanaitis先生说。首先是密封的燃烧室，在压力的为1000英镑平方英寸高的困难。随着锥阀，在提高气缸压力阀按所在地收紧对印章。随着旋转阀，压力往往偏离阀门了。第二个问题，Simanaitis先生说，一直是由按阀门紧紧对燃烧室密封它摩擦引起的功率损耗。第三是从需要保持一个有效的密封摩擦产生的高耐久性不足。科茨先生承认，年纪较大的旋转阀的设计有这样的缺陷，但声称他已解决了他的版本的问题。罗伯特博尔顿，一个在通用汽车公司在密歇根的瓦伦先进的工程中心的工程师，他说旋转阀可能在非常高速的应用非常有用。 “我可以看到，在赛场上的优势，”他说。但是，对于大多数用途，他说，提升阀执行合理的费用可以接受的。

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