一、前言GB3871—83《农业拖拉机试验方法》(以下简称《GB》)规定了拖拉机首先要做动力输出试验,并对该项试验的项目及方法均作了明确规定。这种试验方法比发动机台架试验更能真实地反映拖拉机的动力性和经济性,并且不需拆卸发动机就能直接试验,减少了好多操作上的麻烦,因此这是一种要比发动机台架试验先进的试验方法。随着该项标准的贯彻实施,国内将有越来越多的拖拉机厂、研究所、高等院校要开展这方面的试验工作,我们总站在近两年也为众多 I. Preface GB3871-83 “Agricultural Tractor Test Method” (hereinafter referred to as “GB”) stipulates that the tractor must first do the power output test and clearly stipulates the items and methods of the test. This test method is more realistic than the engine test bench to reflect the dynamic and economic tractor, and without disassembling the engine can be tested directly, reducing a lot of operational trouble, so this is a more than the engine bench Test advanced test methods. With the implementation of this standard, more and more tractors, research institutes and institutions of higher learning in China will have to carry out experimental work in this respect. In the past two years,