What does the term 'dynamic braking' mean in relation to air brakes?

Dynamic braking refers to a method of slowing down a vehicle by using the engine's power in conjunction with the braking system. In this system, when the driver takes their foot off the accelerator, the engine's resistance can create a slowing effect that aids in deceleration. This effect is especially effective during long downhill stretches, where simply relying on traditional brakes can lead to overheating and reduced braking efficiency.

This type of braking takes advantage of the engine's ability to resist motion, converting the kinetic energy of the vehicle into heat energy in the engine and transmission. Consequently, dynamic braking can help maintain better control of the vehicle, reduce wear on brake components, and prevent brake fade during prolonged braking scenarios. This understanding is crucial for safe driving practices, particularly in heavy vehicles that rely heavily on air brake systems.