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施行动力制动时,运行中列车的动能转化为一种中间能量,然后变成热能散逸于大气中或用于其他目的。对于电力制动,车轴驱动的牵引电动机成为发电机,电流被电阻吸收,或者在电力机车上反馈给架空线。但是只有前一种方式是适合于内燃机车的。对于液力制动,车轴驱动的液力制动器是附加于传动装置上的,油在液力制动器中由于交替加速和减速而发热,这个热量传给柴油机的冷却水系统,之后在散热器中冷却。
When dynamic braking is applied, the kinetic energy of the running train is converted into an intermediate energy which then becomes heat dissipated into the atmosphere or used for other purposes. For electric braking, the axle-driven traction motor becomes a generator, the current is absorbed by the resistance, or fed back to the trolley wire on the electric locomotive. However, only the former method is suitable for diesel locomotives. For hydraulic braking, the axle-driven hydraulic brake is attached to the transmission, the oil generates heat in the hydraulic brake due to alternating accelerations and decelerations, and this heat is transferred to the diesel engine cooling water system and is then cooled in the radiator .