Abstract
Piston design approach for automotive engines has been advanced from both experimental and calculation analysis. However, the developments of experimental analysis method that can verify the accuracy of the calculation analysis are required. In this paper, multi-point thin-film pressure sensor for piston pin-boss part (hereinafter pin-boss) was sputtered on piston pin sliding surface and oil-film pressure distribution was measured in axial and circumferential direction using the pin-boss fatigue tester. Additionally, oil-film pressure measurement of the piston pin-boss portion was carried out without changing the environment of the measurement portion by using the thin-film pressure sensor. We also analyzed the application of elastic fluid lubrication theory using CAE analysis, compared with measured values．
