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1前言4115TA型柴油机匹配铁牛一55型拖拉机，该机在农田作业运输中由于发挥了良好的性能，取得了较好的经济效益，赢得了较高的信誉，市场占有率达35％以上，成为农村中用户面很广的拖拉机。但是4115TA型柴油机作为正式产品，还有很多问题急待解决．a．原设计比油耗为2659／kwh
1 Introduction 4115TA diesel engine matches the tractor of a tractor type I. The tractor has obtained good economic benefits due to its good performance in farmland operation and transportation and has won a high reputation with a market share of over 35% Become a user-wide tractor in the countryside. However, 4115TA diesel engine as an official product, there are many problems to be solved. a. The original design than the fuel consumption of 2659 / kwh