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(一)东风_4型内燃机车系列产品1982年铁道部大连机车车辆工厂在东风_4型(后称东风_4A型)内燃机车攻关改进的基础上,开发成功了东风_4B型内燃机车。B型机车在保持柴油机装车功率2427kW不变的条件下,不但使机车的可靠性、耐久性大幅度提高,而且使万吨公里耗油量比A型机车降低了8%。B型机车于1984年投产,1988年获国家优质产品金质奖。
(1) Dongfeng-4 Diesel Locomotive Product Series In 1982, Dalian Locomotive and Rolling Stock Plant of Ministry of Railways successfully developed DF-4B diesel locomotive based on the improvement of Dongfeng-4 type (hereinafter Dongfeng-4A) diesel locomotive. Under the condition of keeping the diesel engine loading power at 2427kW, the B locomotive not only greatly improves the reliability and durability of locomotives, but also reduces the fuel consumption of 10,000t-km by 8% compared with that of the locomotives A. B-type locomotive put into operation in 1984, in 1988 won the gold medal of national quality products.