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发动机的配气机构是汽车运动件中磨损最严重的部件之一,这种磨损问题是提高发动机耐久性的新的重要课题,对凸轮轴与随动件(挺杆来说,由于它们特定的接触方式和工作条件,虽然存在机油润滑,但其接触部位也很难建立润滑油膜,它是易引起固体接触的边界润滑区。因此,很久以来就十分重视防止磨损、拉伤、麻点等表面损坏。据文献[1]介绍,随发动机功率和转速的提高,凸轮和挺杆的的磨损也相应增大,但是由于研制了配气机构新
The engine’s valve train is one of the most worn parts of motor vehicles. This type of wear problem is a new and important issue for improving the durability of engines. For camshafts and followers (tappets, due to their specific Contact and working conditions, although there is oil lubrication, but it is also difficult to establish a lubricant film at the contact area, it is easy to cause the boundary contact lubrication of the solid area, therefore, attaches great importance to prevent wear and tear, pitting and other surface Damage.According to the literature [1] Introduction, with the increase of engine power and speed, the wear of cam and tappet also increased accordingly, but due to the development of the new valve mechanism