Retarders are typically installed in the exhaust system of a tractor trailer, between the turbocharger and the exhaust pipe. When the retarder is engaged, a valve or butterfly valve closes partially or completely, restricting the flow of exhaust gases. This creates backpressure, which forces the engine to work harder against the increased resistance. As a result, the engine's speed and the vehicle's speed are reduced.
Retarders offer several benefits for heavy vehicles:
1. Reduced Brake Wear: By using retarders, drivers can reduce the reliance on the vehicle's brakes, thereby extending the life of the brake components and lowering maintenance costs.
2. Improved Safety: Retarders provide an additional level of safety by allowing drivers to slow down or maintain speed without having to brake heavily, especially when descending long or steep grades. This can help prevent overheating and brake fade, which can lead to accidents.
3. Enhanced Control: Retarders give drivers greater control over their vehicles, especially in situations where maintaining a constant speed is crucial, such as when hauling heavy loads or driving on slippery roads.
4. Reduced Fuel Consumption: Some retarders can generate electricity as they operate, which can be used to power auxiliary systems on the vehicle, such as air conditioning or lighting, potentially leading to improved fuel efficiency.
5. Quieter Operation: Compared to traditional braking systems, retarders operate more quietly, reducing noise pollution in urban areas or sensitive environments.
Retarders are not meant to replace brakes entirely but rather work in conjunction with them to enhance safety, reduce wear and tear, and optimize the overall performance of heavy vehicles.
