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我处1997年6月购置了一台日立EXI100－3型液压挖掘机，其动力源采用的是康明斯QSK19型发动机。该发动机是美国康明斯公司1996年底推向市场的新型电子喷射柴油机。由于它是一种新型、先进的发动机，对燃油、ECM电脑芯片以及感应线路等的维护有很高的要求，为能逐步地使用好该机
In June 1997, I purchased a Hitachi EXI100-3 hydraulic excavator whose power source was a Cummins QSK19 engine. The engine is a new type of electronic injection diesel engine that Cummins Inc. introduced to the market by the end of 1996. Because it is a new type of advanced engine, it has high requirements for the maintenance of fuel oil, ECM computer chips and induction lines, etc., so that it can be used gradually.