为了减小发动机的冷却损失和提高其热效率,国外不少汽车厂商都相继推出自己的绝热式活塞。这些活塞几乎均采用陶瓷活塞顶,采用这种结构不仅生产工艺与原工艺相差甚远,而且在活塞顶与活塞体的紧固问题上也很难找到一种简单而又可靠的解决办法。为此,英国AE集团独辟蹊径,采用钢质活塞顶,利用气囊进行膈热,这样就妥善解决了活塞顶与活塞体的紧固问题,同时,所用的材料和工艺与传统的也相差不远。AE集团研制出了两种气囊式绝热活塞,分别用于单缸机与多缸机(见图)。它们均由一个钢质活塞 In order to reduce the engine cooling loss and improve its thermal efficiency, many foreign car manufacturers have introduced their own adiabatic piston. Almost all of these pistons use ceramic piston tops. With this structure, not only the manufacturing process is far from the original one, but also a simple and reliable solution to the fastening problems of the piston top and the piston body is hard to find. To this end, the British AE Group unique, using steel piston top, the use of balloon diaphragmatic heat, so that properly solve the piston top and piston body fastening problems, while using the materials and processes are not far from the traditional. AE Group has developed two types of air bag-type heat-insulating pistons, respectively for single-cylinder and multi-cylinder machines (see photo). They are made of a steel piston