DF11 quasi-high speed passenger diesel locomotive is the principal diesel locomotive for each speedup of Chinese railway passenger transport. It is equipped with 16V280ZJA diesel engine, JF204C synchronous main alternator and ZD106 traction motor. It can achieve maximum balancing speed of 167 km/h and 143 km/h respectively when hauling 12 passenger cars (640t) and 20 passenger cars (1100t) on flat track. This locomotive was awarded “First Prize of State Scientific & Technological Progress”, “State Eighth Five-Year Plan Tackling Key Science & Technology Problem Prize” and the top prize of “MOR Scientific & Technological Progress”.
The locomotive adopts frame mounted motor suspension, bogie with hollow axle, 6-linking rod driving mechanism.
The microcomputer control system, speed monitoring device, electro-pneumatic, dynamic brake system with self-load function and axle temperature detecting and displaying device are employed in this locomotive．The operator cab head portion is of appropriate streamlined structure at the tilt of 25°and its interior is rational in arrangement, with an air conditioner.
Basic locomotive parameters:
| Purpose |
Passenger transport |
| Rail gage |
1435mm |
| Transmission mode |
AC-DC transmission |
| Axle arrangement |
Co-Co |
| Axle load |
23t |
| Max. Service Power of the engine |
3610kW |
| Max. Operating Speed |
160km/h |
| Constant speed |
65.6 km/h（57.8km/h） |
| Maximum starting tractive effort |
245kN（277kN） |
| Continuous tractive effort |
160kN（181.5kN） |
| Minimum curvature radius negotiated |
145m |
| Capacity of fuel tank |
6500L |
| Locomotive length |
21250mm |
