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首页> 外文会议>SAE International Powertrains, Fuels Lubricants Meeting >Improvements in Fuel Efficiency through Improvements in Cord Reinforcements for Timing Belts
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Improvements in Fuel Efficiency through Improvements in Cord Reinforcements for Timing Belts

机译：通过改进帘线增强器来改进燃油效率

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The overhead camshaft engine efficiency can be improved by control of the rotation and phase of the cam shaft rotation. The aim of this paper is to show the improvements that have been made to the cam shaft rotation through the improvements in the timing belt, and in particular the reinforcing cords within the timing belt. The current state of the art of timing belt reinforcement is presented, and an independent study of the fuel efficiency of a modern timing belt compared to the efficiency of a fully optimised gasoline engine with a timing chain. This considers the power losses due to friction as the timing belt (or chain) transmits power from crank to cam, the power losses expressed as vibrations and noise, the variations in speed of cam rotation for different designs of timing belt, and also consistency of cam rotation through the life of the timing belt (or chain). The improvements have been quantified from engine studies of engine efficiency, engine dynamics, engine friction measurements, accelerometer studies for NVH behaviour and from these the benefits in fuel economy and CO_2 emissions were quantified. Novel systems that use a timing belt running within the engine immersed in oil are discussed. These have been adopted on two engines to date, with significant interest and development projects under way. Of concern to the motorist are not only fuel efficiency but also the cost and frequency of changing a timing belt. The historical mechanisms will be discussed of the changes in timing belts that control the belt durability. The improvements in reinforcing cord design and performance that contribute to life-of-engine belts will be presented, together with cord and belt developments that increase the durability and reliability of the timing belt even further.
机译：通过控制凸轮轴旋转的旋转和相位，可以提高开销凸轮轴发动机效率。本文的目的是展示通过调节皮带的改进而对凸轮轴旋转进行的改进，特别是同步带内的加强帘线。提出了时序带加强件的现实状态，以及与具有定时链的完全优化的汽油发动机的效率相比，对现代时序带的燃料效率的独立研究。这将由于同步带（或链）向凸轮传输功率，这将电力损耗考虑到凸轮的功率，功率损耗表示为振动和噪声，对于不同设计的凸轮旋转速度的变化，以及一致性凸轮旋转通过定时带（或链）的寿命。从发动机效率，发动机动力学，发动机摩擦测量，NVH行为的加速度计研究以及这些燃料经济性和CO_2排放的益处的加速度计研究已经量化了改进。讨论了使用浸入油中的发动机内运行的同步带的新型系统。这些发动机已通过迄今为止采用了迄今为止的兴趣和发展项目。对驾驶者的关注不仅是燃料效率，而且还有改变同步带的成本和频率。将讨论控制带耐用性的时序带的变化的历史机制。将提高加强电源线设计和对发动机皮带的性能的性能，将呈现出绳索和带开发，从而进一步提高正时带的耐用性和可靠性。

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