Types of locomotives for railway transportation

Locomotive type refers to different models of locomotives within the same traction category. It has a significant impact on railway transport capacity, operating speed, operating conditions, and engineering and transport economics.

Since the 1980s, China's locomotive industry has experienced significant development. Steam locomotive production ceased, while high-power electric and diesel locomotives developed rapidly. This has resulted in 4, 6, 8, and 12-axle series and B-B, B0-B0, B0-B0-B0, C0-C0, 2(B0-B0), and 2(C0-C0) axle configuration series (B and C represent two-axle and three-axle bogies, respectively, and 0 indicates electric transmission). Passenger and freight locomotives have axle power of 900 kW and 800 kW for electric locomotives, and 613 kW and 532 kW for diesel locomotives, respectively. The traction and dynamic braking performance of locomotives has been greatly improved.

Technological advancements in the locomotive industry have laid a solid material foundation for flexibly selecting locomotive types in railway design to adapt to the technical standards of track alignment and longitudinal alignment, improving train weight, density, and speed, optimizing the combination of these three factors, meeting different transportation needs, and realizing the design decision-making concept of comprehensive optimization of major railway technical standards and rational matching of mobile and fixed equipment.