What is the advantage of using engine brake retarders?

Using engine brake retarders offers significant benefits for braking efficiency, particularly in large vehicles or heavy loads. The primary advantage is that they assist in braking by using the engine's compression to create resistance, which helps slow down the vehicle without solely relying on traditional braking systems. This method reduces wear on the brake components and enhances overall safety by providing more control during deceleration, especially in slippery or downhill conditions.

Engine brake retarders provide significant braking force at a variety of speeds, especially on long descents, thereby preventing excessive heating of the traditional brakes and allowing them to function more effectively when needed. This is crucial for maintaining vehicle control and ensuring a smoother, more stable ride.

In contrast, some of the other options suggest misconceptions about engine brake retarders. For instance, claiming they increase speed or that they work only at low RPM does not accurately reflect their primary function, which focuses on deceleration. Additionally, stating that they are not efficient disregards the substantial safety and performance improvements they offer when integrated into a driving strategy.