Diesel Technician Practice Test

Injecting fuel into the exhaust is a common strategy for actively regenerating a catalyzed Diesel Particulate Filter (DPF). This method involves the deliberate introduction of fuel into the exhaust stream. By doing so, the temperature in the DPF increases, which facilitates the oxidation of soot trapped in the filter. This process is essential for maintaining the DPF's efficiency and performance, as it helps to burn off the collected particulate matter before it can cause clogging or reduced exhaust flow.

Active regeneration is designed to occur while the engine is running, particularly during driving conditions where elevated exhaust temperatures are achievable. This strategy is effective for keeping the DPF clean, prolonging its service life, and ensuring compliance with emissions regulations.