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China Railway TYPE DF4/A&DF4B Diesel Locomotive

Dongfeng 4 diesel locomotive (DF4) is the first model of the second-generation electric drive diesel locomotive in China Railway, and it is also the first AC-DC electric drive diesel locomotive designed and developed in China. This type of locomotive has experienced a tortuous process from development to maturity. . In the mid-1960s, Dalian Locomotive and Rolling Stock Works and Dalian Thermal Locomotive Research Institute and other units began to develop 240/275 series medium-speed diesel engines, and began to develop 4,000 horsepower electric transmission diesel locomotives using AC-DC transmission devices. In 1969, Dalian Locomotive and Rolling Stock Factory trial-produced the first Dongfeng 4 diesel locomotive, but due to the impact of the Cultural Revolution, the performance and quality of the locomotive did not meet the design requirements. In 1974, with the improvement of diesel engines and progress in test and assessment, coupled with the urgent demand for high-power diesel locomotives on Chinese railways at that time, Dongfeng 4 diesel locomotives were busy being put into mass production before a comprehensive durability test was carried out, causing the locomotives to be put into production. A large number of problems appeared shortly after use, and it has been in a situation of production and improvement for many years since then. After a lot of design improvements and experimental research, the reliability and durability of diesel engines have been greatly improved, and the quality of locomotives has been significantly improved since 1980. Since then, the Dongfeng 4B diesel locomotive, an upgraded product of the Dongfeng 4 locomotive, was launched in 1982. See below for details...
Dongfeng 4B diesel locomotive (DF4B) is a diesel locomotive for mainline passengers and freight used by Chinese railways, and it is also a representative model of the second-generation electric drive diesel locomotive for Chinese railways. The development of Dongfeng 4B diesel locomotive began with the Dongfeng 4 diesel locomotive and 16V240ZJ diesel engine, which were designed in 1965 and put into mass production in 1974. However, due to many problems in the design and manufacturing process of the diesel engine itself, the early Dongfeng 4 type After the diesel locomotive was put into use, failures occurred frequently. After a lot of design improvement and experimental research, the 16V240ZJB diesel engine was developed, which greatly improved its reliability and durability. In 1982, the first Dongfeng 4B diesel locomotive, which was an upgraded product of Dongfeng 4 diesel locomotive, came out. After comprehensive performance tests and application assessments, it proved that its reliability and economy were significantly improved compared with Dongfeng 4 diesel locomotives. In 1984, Dalian Locomotive and Rolling Stock Works began mass production of Dongfeng 4B diesel locomotives. Ziyang Diesel Locomotive Works and Datong Locomotive Works also joined the production ranks in 1986. Up to now, more than 4,500 Dongfeng 4B diesel locomotives have been produced, becoming the largest production volume in the history of Chinese railways. The most widely used diesel locomotive models.

Mods include9 Type ,12 Locomotives


DF4：
•Available： 1975
•Power： 2430kW
•Tractive effort： 302kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4 0003 locomotive
DF4 0003 locomotive is assigned to Shijiazhuang Locomotive Depot of Beijing Railway Bureau.

DF4A
•Available： 1978
•Power： 2430kW
•Tractive effort： 302kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4A 0526 locomotive
DF4A 0526 locomotive is assigned to Guangzhou Locomotive Depot of Guangzhou Railway Bureau.

DF4B（Cyclone filter installed）：
•Available： 1985
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4B 1963 locomotive
DF4B 1963 locomotive is assigned to Fengtai Locomotive Depot of Beijing Railway Bureau.

DF4B 3214 locomotive
DF4B 3214 locomotive is attached to Wenzhou Locomotive Depot of Zhejiang Jinwen Railway Development Co., Ltd.


DF4B 3249 locomotive
DF4B 3249 locomotive is assigned to Xi'an Locomotive Depot of Xi'an Railway Bureau.

DF4B 3390 locomotive
DF4B 3390 locomotive is assigned to Chongqing Locomotive Depot of Chengdu Railway Bureau.


DF4B Passenger Type Early Livery：
•Available： 1986
•Power： 2430kW
•Tractive effort： 243kN
•Speed： 120km/h
•Weight： 138t
•Life span： 30years
DF4B 2104 locomotive
DF4B 2104 locomotive is assigned to Bengbu Locomotive Depot of Shanghai Railway Bureau.

DF4B（Installed with an integral external vortex tube filter）：
•Available： 1989
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4B 3593 locomotive
DF4B 3593 locomotive is assigned to Zhuzhou Locomotive Depot of Guangzhou Railway Bureau.


DF4B passenger type（Cyclone filter installed）：
•Available： 1989
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 120km/h
•Weight： 138t
•Life span： 30years
DF4B 2376 locomotive
DF4B 2376 locomotive is assigned to Yingtan Locomotive Depot of Nanchang Railway Bureau.

DF4B（Installed with double external vortex tube filter）：
•Available： 1996
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4B 9167 locomotive
DF4B 9167 locomotive is assigned to Xiangtang Locomotive Depot of Nanchang Railway Bureau.

DF4B（Double inline vortex tube filter installed）：
•Available： 1998
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 100km/h
•Weight： 138t
•Life span： 30years
DF4B 9531 locomotive
DF4B 9531 locomotive is attached to Xinchang Railway Co., Ltd.


DF4B to D：
•Available： 1999
•Power： 2430kW
•Tractive effort： 324kN
•Speed： 100km/h
•Weight： 138t
•Life span： 20years
DF4D 1031 locomotive
DF4D 1031 locomotive is assigned to Huairou North Locomotive Depot of Beijing Railway Bureau.


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