【摘 要】
：
二冲程发动机具有结构简单、成本低、体积小、功率大等优点,但也有油耗高、排气污染严重的问题。在当前世界上石油日益短缺及保护生态环境意识逐渐加强的形势下,二冲程发动
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二冲程发动机具有结构简单、成本低、体积小、功率大等优点,但也有油耗高、排气污染严重的问题。在当前世界上石油日益短缺及保护生态环境意识逐渐加强的形势下,二冲程发动机现有被淘汰的趋势。就连小型摩托车也装用四冲程发动机,虽车售价高,但仍受用户欢迎。 二冲程发动机油耗高的主要原因是可燃混合气的短路流失。二冲程发动机用活塞控制扫气口和排气口的开闭。排气口先开后关,
Two-stroke engine has the advantages of simple structure, low cost, small size and large power, but also has the problems of high fuel consumption and serious exhaust pollution. In the current world of oil shortage and increasingly aware of the protection of ecological environment situation, two-stroke engines are now out of the trend. Even small motorcycles are also equipped with four-stroke engines, although the car prices high, but still welcomed by users. The main reason for the high fuel consumption of two-stroke engines is the loss of combustible gas mixture. Two-stroke engine pistons control the opening and closing of the scavenging port and exhaust port. Exhaust port to open the first off,
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