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직분식 단기통 디젤기관 피스톤의 순간온도 측정에 관한 실험적 연구
이재순(J. S. Lee),이현구(H. K. Lee),강태경(T. K. Kang),이용래(E. L. Lee),정인곤(I. G. Jung),안병태(B. T. An) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.1
For the experimental measurement of instantaneous surface temperature of the piston of the DI mono cylinder diesel engine, the instantaneous temperature probes, data acquisition system, and grass-hopper type linkage system were developed. The instantaneous temperatures on the piston bowl, crown, lands and skirt were measured and analyzed, and the following conclusions were de. rived ; (i) The crank angle for the maximum instantaneous temperature during one cycle varies and moves back and forth by the measuring positions and engine speeds. (ii) The engine speeds, the positions of the measuring points and the cooling water temperature had an effect on the in-stantaneous temperature amplitude. (iii) The instantaneous temperature swing phenomena ap-peared on the temperature profiles of the piston crown, top and second land of ring, but on the temperature profiles of the parts of the third land of the ring and skirt, they didn't appear. (iv) The isothermal lines in the piston were acquired through the operation of the finite elements method using the measured temperatures as the boundary conditions.