Most push-rod engines and some OHC engines have chains.
2
除了顶置凸轮(OHC)发动机以外,凸轮轴都安装在气缸体里面。
The camshaft also fits inside the block, except on overhead-cam engines (OHC).
3
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.