(EN) Provided is a piston for an internal combustion engine, the piston enabling both an improvement in heat efficiency and a reduction in emissions, and enabling the prevention of overheating of the piston to prevent the occurrence of knocking, pre-ignition, and a drop in air filling efficiency. This piston (100a) for an internal combustion engine constitutes a portion of a combustion chamber (9) of an internal combustion engine (200) and includes a substrate (103), a first film (101) provided on a section of the top surface of the substrate (103) contacting the combustion chamber (9), and a second film (102) provided on another section of the top surface. The piston for the internal combustion engine is characterized in that: the first film (101) has a lower heat conductivity and heat capacity than the substrate (103), and the second film (102) has a lower heat conductivity than the substrate (103) and a higher heat capacity than the first film (101).
(ZH) 本发明提供一种能够兼顾热效率的提高和污染物的减少、而且能防止活塞的过热而防止爆震、早燃的发生以及空气填充效率的降低的内燃机用活塞。本发明的内燃机用活塞(100a)构成内燃机(200)的燃烧室(9)的一部分,该活塞(100a)的特征在于,具有:基材(103);第1膜(101),其设置在基材(103)的与燃烧室(9)接触的顶面的一部分;以及第2膜(102),其设置在顶面的其他部分,第1膜(101)的热导率及热容量小于基材(103),第2膜(102)的热导率小于基材(103),而且热容量大于第1膜(101)。