为了减轻车重,美国钢公司试制成功了冲压缸体。冲压缸体要比铸铁缸体轻67％以上。早在40年代美国微型小型轿车克莱斯勒750毫升的发动机就采用过冲压缸体。在全世界都关心节约能源的今天,一度冷下来的课题又被拣了起来,预计1990年大部分发动机都将采用冲压缸体。 In order to reduce vehicle weight, the successful trial of American steel company stamping cylinder. Stamping cylinder lighter than the cast iron cylinder 67%. As early as the 40’s Chrysler 750-milliliter American mini-compact sedan on the use of over-ram cylinder. Today, as the world cares about energy conservation, the once cold issue has been picked up again. It is estimated that in most of the engines in 1990, the stamping cylinder will be adopted.