What are retarders used for in heavy vehicles?

Retarders are utilized in heavy vehicles primarily to provide an auxiliary slowing effect. They serve as a supplemental braking system, effectively helping to reduce the vehicle's speed without placing excessive wear on the traditional braking system. This is particularly beneficial during long descents or in scenarios where consistent speed control is necessary, as they can prevent brake fade and help maintain better control of the vehicle.

In addition to enhancing overall safety, retarders allow the driver to manage the vehicle's speed more efficiently, especially in heavy loads. This functionality improves the longevity of the vehicle's primary braking components by minimizing reliance on them, which can lead to overheating and decreased performance over time.

Understanding the purpose of retarders underscores their importance in the operation of heavy vehicles, highlighting their role in ensuring a safer and more manageable driving experience.