PSA vehicles (Citroën, Peugeot, some Ford, Volvo models) have installed a special additive dosing system (DPF). The device has its own tank and with the help of an injection pump it automatically doses the amount of additive required for the periodic regeneration of the particle filter into the fuel tank. This mode of active regeneration is based on fuel additive in order to lower the combustion temperature of soot particles. The engine control system monitors with the help of sensors the load level of the particle filter, triggering the regeneration procedure by changing the setting of the fuel flow and the timing of the engine operation. The additive is stored in a separate tank and is automatically mixed with the fuel at the time of fueling. The system requires periodic refilling (at approx. 120,000 km) with JLM PAT Fluid additive of the DPF tank and usually also involves resetting the engine computer, for the operation the presence of a specialist is required. The active regeneration system of the particulate filter is triggered by the sensors that determine the pressure of the exhaust gases or the level of soot loading of the filter. The cleaning occurs by adjusting the fuel injection in order to increase the temperature of the exhaust gases to a value that allows the burning of the deposited soot. Depending on the vehicle model, this type of regeneration can also be initiated by the engine computer every 400-600 km or depending on the mode of operation of the car (urban traffic), the duration of the cleaning cycle being approx. Ten minutes. For systems using this mode of particulate filter regeneration, JLM DPF Cleaner can be used.

PSA vehicles, additive, regeneration system

mechanical engineering

Presentation: poster