China Railways DF4

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This article is about the Chinese locomotive. For other uses, see Dongfeng (disambiguation).

'**DF4**
**东风4'**
Power type	Diesel-electric
First-generation DF4 near Beijing West Trainstation
Model	DF4B
Build date	1969 -
AAR wheel arr.	Co-Co
Gauge	1435 mm
Length	21100 mm
Width	3309 mm
Height	4755 mm
Locomotive weight	138 tonnes
Engine type	16V240ZJB
Transmission	electric (AC-DC)
Top speed	Passenger:120 km/h (75 mph) Freight:100 km/h (62 mph)
Power output	2430 kW
Tractive effort	Passenger:327.5 kN starting, 243 kN continuous Freight:435 kN starting, 324 kN continuous
Locomotive brakes	straight air and dynamic
Train brakes	JZ-7 air
Locale	Peoples Republic of China

The DF4 (Chinese: 东风4) is a type of diesel locomotive used in the People's Republic of China. It has been in production since 1969 and is still produced as of 2007 by several local companies. It is the most common locomotive in China and is used for both passenger and freight services.

1 Models
2 Manufacturers
3 References

[edit] Models

[edit] DF4

The first DF4 was built in 1969 in Dalian. The first 108 locomotives that were built here are the original DF4s using the 16V240ZJ engine. It took seven years to build all 108 locomotives of this type.

Few of the first series DF4 are still in operation, however the first ever is a permanent exhibition at the Beijing Railway Museum [1].

[edit] DF4A

The DF4A distinguishes itself from first series DF4s with an improved engine, the 16V240ZJA. Production started in 1976 and lasted until 1984.

[edit] DF4B

DF4B are very similar to standard DF4 and DF4A, apart from an improved engine (16V240ZJB). Production started in Dalian in 1984.

[edit] DF4C

The DF4C was supposed to replace the DF4B as the main diesel locomotive in China and comes with several improvements, including a new engine revision (16240ZJC). The first DF4C was produced in 1985 and batch production started four years later, in 1989, and lasted until roughly the end of the 20th century.

The DF4C comes in a different color scheme than the previous DF4s, namely dark blue and later light blue and beige.

[edit] Gearing variations

The DF4, DF4A, DF4B and DF4C were each produced with two different gear ratios, "passenger" (120 km/h) and "freight" (100 km/h). The passenger variant was often painted orange [2].

[edit] DF4D

The DF4D, the most recent DF4 revision, has been produced since 1996 with the 16V240ZJD engine. The passenger versions increased top speed to 145 or 170(DF4DK) km/h, and a road-switcher version was also introduced [3].