链条驱动机构包括一条双排辊链，通过它来驱动进气和排气凸轮轴。
The chain drive consists of a duplex roller chain which drives both intake and exhaust camshafts.
采用多项式高次方凸轮对WD 618.44柴油机原排气凸轮进行了改进设计。
To solve the problems existed in the valve train of WD618.44 diesel engine, a new polynomial high power exhaust CAM profile was designed.
计算结果表明，新凸轮很好地解决了原排气凸轮存在的问题，应用后效果良好，为企业取得了较好的经济效益。
The dynamic calculation indicates that the effect is very good and an excellent economic benefit is gained for the enterprise.
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