由液力变矩器和变速器组成的“双变”系统已经成为领跑配套件行业发展的主力,而其直接配套的铲运机械,特别是装载机,也已经成为我国工程机械产业最具全球竞争力的产品类别从我国工程机械各主要配套件发展现状可以看出,液力传动部件作为工程机械核心元件之一,是我国目前惟一具有自主知识产权、可以实现国内自主配套的零部件,由液力变矩器 The “double-change” system consisting of torque converter and transmission has become the main force in the development of the industry in the leading parts industry. The direct supportive shoveling machinery, especially the loader, has also become the most Global Competitiveness Product Categories From the development status of major construction machinery parts in China, it can be seen that hydraulic transmission components, as one of the core components of construction machinery, is the only component with independent intellectual property right in China that can be self-supporting domestically. By the torque converter