What is the primary function of retarders in commercial vehicles?

The primary function of retarders in commercial vehicles is to slow the vehicle and reduce brake wear. Retarders, such as engine brakes or exhaust brakes, provide additional braking force by using the vehicle's engine or other components to slow down the vehicle without relying solely on the traditional brake system. This is particularly beneficial for heavy vehicles, as it helps maintain a safe speed while descending hills and reduces the need for frequent braking, which can lead to overheating and wear on brake components. By employing retarders, drivers can enhance safety and prolong the lifespan of the braking system, which ultimately leads to less maintenance and operational costs. Retarders also contribute to better control of the vehicle during deceleration.