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一、本世纪七十年代以前,中国的汽车工业是以发展中型卡车为主,重型汽车的生产非常少,而且这些汽车产品基本上都是从国外(苏联、捷克、法国等)引进全套生产图纸,很少有国内自行设计的产品。自七十年代初开始,陕西汽车齿轮厂(以后并入中国重型汽车工业企业联营公司)着手研制为5吨军用越野汽车配套的变速器——5J80T变速器(图1),从而揭开了国内自行设计重型汽车变速器的历史。近十年期间,
First, before the seventies of this century, China’s auto industry was dominated by medium-sized trucks. The production of heavy-duty vehicles was very small. Basically, these auto products were imported from abroad (the Soviet Union, the Czech Republic and France) , Very few domestic design products. Since the early 1970s, Shaanxi Automobile Gear Factory (later merged with China Heavy Duty Truck Industrial Enterprise) started to develop the 5J80T transmission (Figure 1), which is a 5-ton military cross-country vehicle, Heavy-duty transmission history. During the past decade,