The crack and failure of aperture of larynx of piston combustion chamber can lead to the increasing trend with explosive pressure increasing, use FEA technology and engine durability test to research the crack effect of combustion chamber with the irregular shape structure of piston pinhole. 针对活塞燃烧室喉口开裂失效随着爆发压力提高有所增加的趋势,利用FEA技术并结合发动机耐久试验进行了异形销孔结构对燃烧室开裂影响的研究。
Heat stress and material creep deformation can lead to the fatigue and crack of aperture of larynx, besides the structure of piston pinhole has on important effect on the crack of combustion chamber. 除了热应力、材料蠕变等会引起喉口疲劳开裂外,发现活塞销孔结构对燃烧室开裂也有重要影响。