1.前言工程机械遍布世界各地,如非洲、苏联、南美、智利等都在使用。但是与其配套的动力,在大部分场合下,即不论是在热带、寒带,还是在高原地区却使用同一功率的发动机。在工厂里同一功率的发动机,大多也用在不同的地方。但是,尽管使用地点不同,季节之间和一日之间气温变化很大,发动机运转时也并不调整。 1. Foreword Construction machinery throughout the world, such as Africa, the Soviet Union, South America, Chile and so on are in use. However, with its supporting power, in most occasions, that is, whether it is in the tropics, the frigid zone, or in the plateau region, the same power engine is used. In the factory the same power of the engine, mostly used in different places. However, the temperature varies widely between seasons and on a day-by-day basis despite different locations, and the engine is not operating at all.