Thermal load analysis of aluminium piston enwrapped steel ring in internal-combustion engine

For the pile char generated in first ring groove of piston when diesel worked more than 40 hours, aluminum piston enwrapped steel ring was used to resolve the problem. And cooling oil antrum was moved up to close to piston top. I-deas software and the finite element method were used to analyze piston. Ambient temperature and heat transfer thermal coefficients between piston and its surrounding material were ascertained by the third confine conditions. Temperature distribution of piston was obtained, and intensity and distortion of piston under thermal load were studied. The results show that the temperature of first ring groove on piston is fall. The intent of ameliorating temperature distribution is realized. The research can optimize the piston and ensure its dependability.