China Railways DF8

The DF8 (Chinese: 东风8; translation: East Wind, Easterly) is a type of diesel locomotive used in 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.

DF8
东风8
The first generation of DF8 family, batch-produced hull configuration
Type and origin
Power typeDiesel-electric
BuilderCRRC and its predecessors
ModelDF8, DF8B, DF8BJ, DF8CJ, DF8D, DF8DJ (domestic)
Build date1984-present
Total producedDF8: 141
DF8B: 1200+
DF8BJ: 1
DF8CJ: 3
DF8D: 4
DF8DJ: 1
Specifications
Configuration:
​
 • AARC-C
Gauge1,435 mm (4 ft 8+1⁄2 in) (domestic models)
Fuel capacityDF8B plateau type: 8,000 L (2,100 US gal)
DF8D: 9,000 L (2,400 US gal)
DF8B 5672 (rebuilt DF8DJ): 9,000 L (2,400 US gal) diesel oil, 2,400 L (630 US gal) LNG
Prime moverDF8: 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)
Engine typeV16 diesel engine
DF8D: V12
Rebuilt DF8DJ (DF8B-5672): dual-fuel engine (LNG & diesel oil)
Cylinder sizeDF8, DF8B, DF8BJ: 280 mm × 285 mm (11.024 in × 11.220 in)
bore x stroke
DF8CJ: 280 mm × 300 mm (11.024 in × 11.811 in)
DF8D: 280 mm × 320 mm (11.024 in × 12.598 in)
TransmissionDF8, DF8B, DF8D: Electric (AC-DC)
DF8BJ, DF8CJ, DF8DJ: (AC-DC-AC)
Loco brakeStraight air and dynamic
Train brakesAir
Performance figures
Maximum speedDF8, DF8B, DF8D: 100 km/h (62 mph)
DF8BJ, DF8CJ, DF8DJ: 120 km/h (75 mph)
Power outputDF8: 3,310 kW (4,440 hp)
DF8B: 3,680 kW (4,930 hp)
DF8BJ: 4,000 kW (5,400 hp)
DF8CJ: 4,410 kW (5,910 hp)
DF8D: 3,820 kW (5,120 hp)
DF8DJ: 4,800 kW (6,400 hp) (before rebuilt)
Tractive effortDF8: 441 kN (99,000 lbf) starting
314 kN (71,000 lbf) continuous
DF8B: 441 kN (99,000 lbf) starting
347 kN (78,000 lbf) continuous
DF8CJ: 560 kN (130,000 lbf) starting
440 kN (99,000 lbf) continuous
DF8D: 480.5 kN (108,000 lbf) starting
363.5 kN (81,700 lbf) continuous
Career
OperatorsChina Railways, multiple local operators, exported to several other countries
LocalePeople's Republic of China, Kenya, Iran, etc.
DF8B-0154 at Fengtai Locomotive Depot, Beijing Railway Bureau.
DF8B-0154's bogie
DF8B 7001 in Liuzhou Locomotive Depot which use two radial bogies.
Prototype engine DF8-0001 is preserved at the China Railway Museum.

Models

DF8

The first generation DF8 is powered by the original 3,310 kW (4,440 hp) 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.

DF8B

The second generation, DF8B, is powered by an updated 16V280ZJA engine with 3,680 kW (4,930 hp), whose production started in 1997. Qishuyan manufactured 0 series, while Ziyang Locomotive Works manufactured 5000 series.

7000 series version

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]

9000 series version

Qishuyan built a few DF8Bs originally for Qingzang Railway, however they were unsuccessful. They were numbered DF8B-9001 and 9002.[2]

A variant of DF8B has been designed for use in Jamaica by Qishuyan.[3]

12 CKD4Cs were exported to Venezuela and are called DF8Bven, however they are generally identical to the domestically used DF8B.[4]

A variant of DF8B has been designed for Mombasa-Nairobi railway in Kenya.[5]

A variant of DF8B, DF8BI, has been designed for use in Iran.[6] There is another model SDD21 designed for Iran, equipped with a 12V280ZJ engine.[7]

A variant of DF8B, CKD9A, has been designed for use in Turkmenistan.[8]

A variant of DF8B, SDD16, has been designed for use in Guinea.[9]

There is a model SDD17 with 12V280ZJ prime mover, used in Saudi Arabia.[10]

There is a model SDD19 with 6280ZJ prime mover, used in Uzbekistan.[11]

Passenger models DF9 and DF11 series use the same 16V280ZJA prime mover as DF8B.

DF8BJ

The DF8BJ, which uses the 16V280ZJG engine (4,000 kW or 5,400 hp), GTO VVVF inverter and AC traction motors, was produced by Ziyang.[12] It was designed for Qingzang Railway.

DF8CJ

The DF8CJ is produced by Qishuyan. It was equipped with a 16V280ZJB (R16V280ZJ) engine (maximum power 4.4 MW or 5,900 hp) and AC traction motors.[13]

Later passenger model HXN5K, freight model HXN5B and FXN5C use a 12-cylinder version (R12V280ZJ) prime mover.

DF8DJ

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 5.08 MW (6,810 hp) and AC asynchronous traction motors[14] and its service power is 4.8 MW (6,400 hp). 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).[15]

Preservation
  • DF8-0001: preserved at China Railway Museum
  • DF8-0092: preserved at Shenyang Railway Museum[16]
  • DF8-0089: on display at Mudanjiang Locomotive Depot

See also

References
  1. DF8B 7000 Series Diesel Locomotive, TrainNets.com
  2. DF8B 9000 Series Diesel Locomotive, TrainNets.com
  3. "CRRC to supply locomotives to Jamaica". Railway Gazette International. 7 January 2018.
  4. "People's Daily Online -- China sells high power diesel locomotives to Venezuela". en.people.cn. Archived from the original on 2021-10-25. Retrieved 2021-10-24.
  5. "CRRC official website". Archived from the original on 2017-04-08.
  6. "CRRC official website". Archived from the original on 2016-09-24.
  7. "CRRC official website". Archived from the original on 2016-09-24.
  8. "CRRC official website". Archived from the original on 2016-10-26.
  9. "CRRC official website". Archived from the original on 2016-09-24.
  10. "CRRC official website". Archived from the original on 2016-09-24.
  11. "CRRC official website".
  12. "Type DF8BJ Diesel Locomotive". Archived from the original on 2007-09-03. Retrieved 2007-10-17.
  13. 东风8CJ型交流传动重载货运内燃机车 Archived 2010-09-14 at the Wayback Machine (Dongfeng 8CJ Heavy Freight Diesel Locomotive AC drive), www.csrgc.com.cn
  14. 东风8DJ型大功率交流传动货运内燃机车 (Dongfeng 8DJ High Power AC Drive Freight Diesel Locomotive), www.zyloco.com
  15. "CRRC official website (in Chinese)". 7 December 2015.
  16. DF8-0092 was sent to Shenyang Railway Museum, weibo.com
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