节约自然资源和有效地进行环境保护始终是社会主义计划经济的原则.由于对原材料(主要是原始能源)的开采在不断加紧,而且最近明显出现了自然环境遭受破坏的危险,所以研制节约材料和燃料以及对环境污染少的发动机在不久的将来有特殊的意义.表1列出了目前众所周知的几种发动机方案的对比.由表可以看出,在考虑到国民经济的所有方面的情况下,内部形成混合气的二冲程汽油机(主要是中小排量的二冲程汽油机)是一种最佳方 Conservation of natural resources and effective environmental protection have always been the principle of a socialist planned economy, and as the exploitation of raw materials (mainly primary energy) continues to intensify and there has recently been a marked risk of damage to the natural environment, the development of economically viable and The fuel and the less-polluting engines have special significance in the near future, as is shown in Table 1. A comparison of several well-known engine variants is now given in Table 1. From the table it can be seen that taking into account all aspects of the national economy, A two-stroke gasoline engine (mainly a two-stroke gasoline engine with a small displacement) that forms a mixture inside is the best