目前 ,绝大多数轿车均采用顶置凸轮轴式发动机 ,而作为曲轴与凸轮轴的正时动力传送机件 ,正时齿胶带的应用越来越多 ,有取代正时链条的趋势 ,这主要是由于正时齿胶带具有同步性好、传动比精确度高和使用速度范围较大等诸多优点 ;同时 ,齿胶带传动平稳 ,无需调整 ,张紧力小 ,噪 At present, the vast majority of cars are used overhead camshaft engine, and as a crankshaft and camshaft timing power transmission parts, timing teeth more and more applications of tape, there is the trend to replace the timing chain, which mainly Is due to the timing of the tooth tape with good synchronization, high transmission ratio and the use of high speed range and many other advantages; the same time, tooth belt transmission smooth, without adjustment, tension is small, noisy