Dongfeng 4 diesel locomotive is an electric drive trunk diesel locomotive developed by China in 1960s, and it has been put into mass production since 1960s. In order to improve the performance, reliability and service life of Dongfeng -4 diesel locomotive in mass production, a lot of improvements and tests have been carried out for many years, and the research results have been applied to new locomotives one after another. Dalian Locomotive & Rolling Stock Works continues to study the problems of insufficient strength and stiffness and poor dynamic performance of shafting of 16V240ZJ and 16V240ZJA diesel engines. 1977 trial-produced the reinforced new structure engine, and introduced many parts with new structure and new technology into the new diesel engine. After the test, it is in good condition, and finally it is determined to be 65438+, which is an upgraded product of a diesel engine. 1in March, 1978, the Ministry of Railways of People's Republic of China (PRC) and China held the appraisal meeting of 16V240ZJB diesel engine in Dalian factory, and approved the preliminary finalization of the diesel engine, which can be put into small batch production. 1July to September, 979 198 1 day, 16V240ZJB diesel engine was tested in Dalian diesel locomotive research institute according to UIC standard. After the successful development of Dongfeng 4B freight locomotive, Dalian factory began to carry out derivative modification on its basis. 1985 65438+February, Dongfeng 4B plateau locomotive was successfully trial-produced in Dalian factory. The locomotive is equipped with a high-pressure ratio and high-efficiency turbocharger developed by Dalian Diesel Locomotive Research Institute and the governor of Woodward Company in the United States. The locomotive power can be automatically corrected with altitude, and the locomotive output power can still reach 1845 at an altitude of 3000m. The first locomotive successfully passed the traction test of plateau line in March 1986 on the Nanjiang Railway under the management of Urumqi Railway Bureau. At present, Qinghai-Tibet Railway, lanzhou railway administration Railway Bureau, Urumqi Railway Bureau and Hohhot Railway Bureau of Qinghai-Tibet Railway Group mainly use plateau locomotives.

1986 65438+in February, Dalian factory developed the first Dongfeng 4B passenger locomotive (2 10 1), which was first used in Shanghai Locomotive Depot of Shanghai Railway Bureau. Passenger locomotive is modified on the basis of freight locomotive, but the transmission gear ratio is changed from freight locomotive 63: 14 to passenger locomotive 7 1: 2 1, and the structures of the two locomotives are basically the same. The construction speed of passenger locomotives was increased to 120km/h to meet the needs of expanding passenger train formation and speeding up, and mass production began from 1987.

At the same time, Ziyang Diesel Locomotive Works and Datong Locomotive Works started to manufacture Dongfeng 4B diesel locomotives on 1986 according to the instructions of the Ministry of Railways and the drawings provided by Dalian Locomotive Works. 65438+June 2 1, 0986, the first Dongfeng 4B locomotive (310/) produced by Ziyang Factory was delivered; On September 22nd of the same year, the first Dongfeng 4B locomotive (600 1) manufactured by Datong Factory left the factory. 1994, Sifang Locomotive & Rolling Stock Factory also trial-produced two Dongfeng 4B locomotives (7364 and 7365). Because it is a technical verification vehicle of Dongfeng 4E, the body directly adopts the appearance of Dongfeng 4E.

Up to 1998, Dalian plant, Ziyang plant, Datong plant and Sifang plant have produced 4,303 sets of Dongfeng 4B locomotives, which is equivalent to 42.5% of the total number of diesel locomotives in China Railway 1999. By the end of 1990, although the Ministry of Railways of China has stopped purchasing Dongfeng 4B locomotives, Dalian and Ziyang factories will still produce Dongfeng 4B locomotives according to the needs of local railways, industrial and mining enterprises and overseas railway companies. At present, the latest Dongfeng 4B freight locomotive produced by Ziyang Diesel Locomotive Factory is No.9702, and the delivery time is 20 14. The latest Dongfeng 4B freight locomotive produced by Dalian Locomotive & Rolling Stock Factory was delivered with the number of 7794,2014, and was purchased by Gansu Huating Coal Industry by railway transportation. The latest passenger locomotives are 2684 and 2685 locomotives produced by Dalian Locomotive and Rolling Stock Factory, which were purchased by Weihai Local Railway Bureau at 1998.

From 2006 to 2008, the Ministry of Railways of China provided three batches of Dongfeng -4 and Dongfeng -4B locomotives to the DPRK. In the latest year of 2008, the 12 Dongfeng 4 locomotive belonging to Beijing Railway Bureau was handed over to North Korea free of charge after renovation. In the Korean railway system, these locomotives are numbered? 2xx(Naey？ N 2xx internal combustion 2××).