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首钢矿山公司近年来引进一批美国卡明斯(Cummins)发动机公司 N 系列发动机,装在贝拉斯汽车和推土机上。修理时 PT 燃油系的NH/NT/NTA 型喷射器的调节,对发动机的性能关系很大。常用的扭矩调节法(靠给调整螺栓一定的扭力矩来决定喷射器的喷油量)虽然操作简单,但所用工具精度要求高(扭力只有0.55公斤·米)而且不够准确,因为除了在扭紧锁止螺母时调节螺栓会发生位移外,还有温度的影响。卡明斯公司还有一种行程法,比较可靠。现根据其使用保养手册和日本小松制作所科研所资料,结合我们的使用体会,介绍如下。
In recent years, Shougang Mining Company has introduced a number of Cummins engine company N series engines, which are installed on the Belas cars and bulldozers. The adjustment of the PT fuel system NH / NT / NTA injector at repair time has a great influence on the performance of the engine. Commonly used torque adjustment method (by adjusting the bolt to determine the torque of the injector to determine the amount of fuel injector) Although the simple operation, but the tools used precision (torque 0.55 kg · m) and not accurate enough, in addition to tightening Locking nut will occur when the adjustment screw displacement, but also the impact of temperature. Cummings company also has a travel law, more reliable. Now according to their use of maintenance manuals and Komatsu Institute of Japan scientific research data, combined with our use of experience, introduced below.