介绍一种用于双顶置凸轮轴式发动机的采用两级谐波传动的新型进气凸轮轴调相机构。
A new camshaft-phasing mechanism with twin harmonic drives is described and illustrated, which can be adopted to DOHC (double overhead camshaft) engines.
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.
进气行程：凸轮轴打开进气阀，活塞在汽缸中向下运动，产生一段真空。
Intake stroke: the camshaft opens the intake valve and the piston moves down the cylinder. This creates vacuum and sucks in air and fuel into the combustion chamber above the piston.
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