GB/T 3316-2019Method of defining the power for diesel locomotives (English PDF)

3.1 Rated power, nominal power of diesel engine

The effective power that is calibrated on the label after the diesel engine manufacturer has completed the bench test to verify the performance of the diesel engine. [GB/T 3367.2-2018, definition 5.2]

4.2 Determination of calculated power at wheel rim

The calculated power at wheel rim of the diesel locomotive is determined based on the loading power. When determining the calculated power at wheel rim of the diesel locomotive, the following power values shall be deducted from the loading power:

a) consumption of auxiliary power of locomotive:

1) when the diesel engine exerts the loading power, if the load is adjustable, take the value by 2/3 of its rated absorption power;

2) when the diesel engine exerts the loading power, if the load is not adjustable, take the value by its rated absorption power;

3) in the case where the diesel engine provides both traction and train power supply, the train power supply shall be deducted and shall be carried out in accordance with 4.2 a)1).

Note 1: short-term power loads, such as locomotive air compressors, are not counted.

b) the minimum power loss of the transmission system, when the diesel engine is performing its loading power, namely:

1) main generators, rectifiers, traction converters (if any) and traction motor systems for electric drive;

2) hydraulic transmission box and intermediate (condition) gearbox system for hydrodynamic drive.

c) power loss of the axle drive system.

Note 2: the diesel engine loading power that deducts the power consumption which is specified in 4.2 a) and 4.2 b), is the nominal power.

4.3 Power unit

The power is measured in kilowatts (kW), and its value is rounded to the ten-digit. The specific value is rounded according to GB/T 8170.

4.4 Power determination method diagram

The schematic diagram of the method for determining the calculated power at wheel rim of diesel locomotives is shown in Figure 1. […]