China Railways DF4B

Dongfeng 4B diesel locomotive (DF4B) is a mainline passenger and freight diesel locomotive used by China Railways, and is also a representative model of the second-generation electric drive diesel locomotives of China Railways. The development of the Dongfeng 4B diesel locomotive began with the Dongfeng 4 diesel locomotive and 240/275 series medium-speed diesel engines, which were designed in 1965 and put into mass production in 1974. However, due to the many problems in the design and manufacturing process of the diesel engine itself, it led to early delivery. After the Dongfeng 4 locomotive was put into operation, failures frequently occurred. After a large number of design improvements and experimental studies, the 16V240ZJB diesel engine was developed, which greatly improved its reliability and durability. In 1982, the first Dongfeng 4B locomotive, an upgraded product of the Dongfeng 4 locomotive, came out. After a comprehensive performance test and application assessment, it was proved that its reliability and economy were significantly improved compared to the Dongfeng 4 locomotive. In 1984, Dalian Locomotive and Rolling Stock Factory began mass production of Dongfeng 4B diesel locomotives. Ziyang Diesel Locomotive Factory and Datong Locomotive Factory also joined the production line in 1986. So far, they have produced more than 4,500 Dongfeng 4B diesel locomotives, becoming the largest output in the history of Chinese railways. , One of the most widely used diesel locomotive models with the most mature technology. 若有来生's train chip AD. Commutator WS. Gear control

1. Horn
2. Emergency brake (clear gear)