| Dongfeng 8 东风8 | |
| Powertype: | Diesel-electric |
| Builder: | CRRC and its predecessors |
| Gauge: | (domestic models) |
| Uicclass: | Co′Co′ |
| Builddate: | 1984-present |
| Totalproduction: | DF8: 141 DF8B: 1200+ DF8BJ: 1 DF8CJ: 3 DF8D: 4 DF8DJ: 1 |
| Locale: | People's Republic of China, Kenya, Iran, etc. |
| Poweroutput: | DF8: 3310kW DF8B: 3680kW DF8BJ: 4000kW DF8CJ: 4410kW DF8D: 3820kW DF8DJ: 4800kW (before rebuilt) |
| Fuelcap: | DF8B plateau type: 8000L DF8D: 9000L DF8B 5672 (rebuilt DF8DJ): 9000L diesel oil, 2400L LNG |
| Tractiveeffort: | DF8: 441kN starting 314kN continuous DF8B: 441kN starting 347kN continuous DF8CJ: 560kN starting 440kN continuous DF8D: 480.5kN starting 363.5kN continuous |
| Primemover: | DF8: 16V280ZJ DF8B: 16V280ZJA DF8BJ: 16V280ZJG DF8CJ: 16V280ZJB (R16V280ZJ) DF8D: 12V280ZJ (280/320, not the same series with 16V280ZJ (280/285)) DF8DJ: CAT 3616 (before rebuilt) |
| Enginetype: | V16 diesel engine DF8D: V12 Rebuilt DF8DJ (DF8B-5672): dual-fuel engine (LNG & diesel oil) |
| Cylindersize: | DF8, DF8B, DF8BJ: 280x bore x stroke DF8CJ: 280x DF8D: 280x |
| Transmission: | DF8, DF8B, DF8D: Electric (AC-DC) DF8BJ, DF8CJ, DF8DJ: (AC-DC-AC) |
| Locobrakes: | Straight air and dynamic |
| Trainbrakes: | Air |
| Buildmodel: | DF8, DF8B, DF8BJ, DF8CJ, DF8D, DF8DJ (domestic) |
| Maxspeed: | DF8, DF8B, DF8D: 100km/h DF8BJ, DF8CJ, DF8DJ: 120km/h |
| Operator: | China Railways, multiple local operators, exported to several other countries |
The DF8 is a type of diesel-electric locomotive used by China Railway in the People's Republic of China. It was in production from 1984 until mid-1990s, with mass production starting in 1989. The revised DF8B is still in production today. DF8 are almost exclusively used for freight services.
The first generation DF8 is powered by the original 3310kW 16V280ZJ engine, manufactured by Qishuyan Locomotive and Rolling Stock Works. 141 locomotives are produced from 1989 to 1997. The prototype engine DF8-0001&0002 features different hull design with the batch-produced engines.
41 engines (0001-0041, including 2 prototype engines) assigned to South Wuchang Locomotive Depot, China Railway Wuhan Group, 100 engines assigned to Mudanjiang Locomotive Depot, China Railway Harbin Group.
The second generation, DF8B, is powered by an updated 16V280ZJA engine with 3680kW, whose production started in 1997. Qishuyan manufactured 0 series, while Ziyang Locomotive Works manufactured 5000 series.
In 2000, Qishuyan built a DF8B with radial bogies numbered DF8B-7001. As an experimental locomotive there was only one produced. Now it is owned by Liuzhou Locomotive Depot, Nanning Railway Bureau.[1]
Qishuyan built a few DF8Bs originally for Qingzang Railway, however they were unsuccessful. They were numbered DF8B-9001 and 9002.[2] In 2006, in order to cope with the situation that the NJ2 locomotives had not fully arrived when Qingzang Railway began to be fully operational, the Ministry of Railways still ordered 10 DF8Bs, numbered 9003~9012.[3] [4] In 2015, Qinghai Local Railway Construction Investment Co., Ltd. separately ordered 5 units for the operation of Xitieshan-North Hulsan Lake Railway, numbered 9013~9017.[5]
A variant of DF8B has been designed for use in Jamaica by Qishuyan.[6]
12 CKD4Cs were exported to Venezuela and are called DF8Bven, however they are generally identical to the domestically used DF8B.[7]
A variant of DF8B has been designed for Mombasa-Nairobi railway in Kenya.[8]
A variant of DF8B, DF8BI, has been designed for use in Iran.[9] There is another model SDD21 designed for Iran, equipped with a 12V280ZJ engine.[10]
A variant of DF8B, CKD9A, has been designed for use in Turkmenistan.[11]
A variant of DF8B, SDD16, has been designed for use in Guinea.[12]
There is a model SDD17 with 12V280ZJ prime mover, used in Saudi Arabia.[13]
There is a model SDD19 with 6280ZJ prime mover, used in Uzbekistan.[14]
Passenger models DF9 and DF11 series use the same 16V280ZJA prime mover as DF8B.
The DF8BJ, which uses the 16V280ZJG engine (4000kW), GTO VVVF inverter and AC traction motors, was produced by Ziyang.[15] It was designed for Qingzang Railway.
The DF8CJ is produced by Qishuyan. It was equipped with a 16V280ZJB (R16V280ZJ) engine (maximum power 4.4MW) and AC traction motors.[16]
Later passenger model HXN5K, freight model HXN5B and FXN5C use a 12-cylinder version (R12V280ZJ) prime mover.
Ziyang made a special DF8B which was originally intended to be used on the Qingzang line and was numbered DF8DJ-0001. The DF8DJ version has a Caterpillar 3616 engine of rated power 5.08MW and AC asynchronous traction motors[17] and its service power is 4.8MW. The Chinese Ministry of Railways rejected the proposal and it was renumbered DF8B-5672. It's now running on Xiyan Line in Shaanxi and has been remodified with dual-fuel engine (LNG & diesel oil).[18]