1引言轮式装载机是我国工程机械行业中的优势产品，2001年中国主要轮式装载机生产厂家的产销量已经达到24870台，而且市场需求量每年都在扩大。如图1所示，中国轮式装载机的产销量主要集中在中小吨位机型上，大型轮式装载机产销量几乎为零，而大型轮式装载机的开发与制造能力代 1 Introduction Wheel loaders are the dominant products in China’s construction machinery industry. In 2001, the production and sales volume of the major wheel loader manufacturers in China reached 24,870 units, and the market demand has been expanding every year. As shown in Figure 1, the production and sales of wheel loaders in China are mainly concentrated in small and medium-tonnage tonnage models. The production and sales of large wheel loaders are almost zero. However, the development and manufacturing capacity of large wheel loaders