Equipped with AC-DC transmission, DES-DF4C diesel locomotives are designed for the purpose of passenger or freight traction on main lines. Locomotives for different services have the same structures but different gear ratios.
DES-DF4C diesel locomotive equipped a 2,650 kW diesel engine and TQFR-3100B AC synchronous traction alternator. Three-axle bogies with a low four-rod mechanism traction and rolling bearing journal box, while two-stage suspension system is composed of journal box springs and bearing rubber elements. Through a thyrestor, three-phase alternating current is fed to ZQDR-410C traction motors which then drive the wheel sets via traction gears. The traction motor is suspended form the axle of the wheel set. Type JZ-7 brake equipment is used for the braking system so as to brake the locomotive independently or together with the whole vehicles trailed. Electric resistance brake can also be applied on long down gradient. Box structured with side wall loading for the body. There are two cabs on each end, in either which the locomotive can be controlled.
The locomotive features high power, good performance, low oil consumption, reliable operation, easy maintenance and comfortable working conditions.
Transmission |
AC/DC |
Wheel arrangement |
Co-Co |
Axle load |
23 t |
Service power |
2,650 kW |
Design speed |
120/100 km/h |
Starting tractive effort |
302.6/480.48 kN |
Continues tractive effort |
331/440 kN |
Min. curve negotiation radius |
145 m |
Length over coupler centers |
21,100 mm |
Diesel engine model |
16V240ZJC |