Equipped with AC-DC transmission, Type 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.
Type DF4C diesel
locomotive was developed on the basis of DF4B locomotive. It is
a version of advanced-world-level of 1980¡¯ with a longer service
life and improvements on locomotive operating power, tractive performance
and drivers¡¯ working conditions. Not only the economy and reliability
are improved, but also the problems of unreasonable arrangement
and inertia mass exsisted in DF4B resolved.
Driven by diesel
engine, the AC synchronous traction alternator generates three-phase
alternating current. Through a thyrestor, the current is fed to
traction motors which then drives the wheel sets via traction gears.
Box structured with side wall loading for the body, the locomotive
has a cab on both end, in either which the locomotive can be controlled.
From the front to
the rear, there are cab I, electric apparatus room, power room,
cooling room, auxiliary room and cab II. With batteries on both
sides, the fuel tank is fixed beneath the middle of main frame.
The running gear of locomotive consists of two interchangeable 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. 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. The locomotive
can be operated in tandem.
Air for diesel engine
will be filtered by means of V-strainer mesh, high-efficiency multiple
tube air spin cleaner and paper filter while the oil be filtered
by high-efficiency polypropylene fibre filter element.
features good performance ,low oil consumption, reliable operation,
easy maintenance and comfortable working conditions. It has a perfect
versatility with DF4B. Wherever DF4A or DF4B locomotive can be manutatured,
operated or maintained, DF4C locomotive can be operated and repaired
in a same way.