随着我国汽车工业的发展，我国车用（轻型汽车和轿车）汽油发动机近年来发展较快，已具备了相当规模。80年代初，轻型汽车所用汽油发动机绝大部分是492Q型汽油机。而近几年，我国引进了外国先进汽油发动机，一些产品产量逐年上升．并且已经基本具备了经济规模。根据现有14个生 With the development of the automobile industry in our country, the gasoline engines for cars (light-duty cars and sedans) in our country have developed rapidly in recent years and already have a considerable scale. In the early 1980s, the majority of gasoline engines used in light vehicles were 492Q gasoline engines. In recent years, China has introduced advanced foreign gasoline engines and the output of some products has increased year by year. And already have the basic economic scale. Based on the existing 14 students