Carbon deposit prevention system — operation (Peugeot Eurovans 807)

Citroen C8, Peugeot 807, Fiat Ulysee and Lancia Phedra vehicles are equipped with a carbon deposit prevention and emission reduction system. The system operates by injecting a suitable additive into the fuel, which is based on cerin (4.2% concentration), a hydrocarbon-based solvent and an agent that acts as a catalyst. This additive is filled into a 5-liter tank located under the fuel tank. This filling is enough for 80,000 kilometers. The tank contains a pump for injecting the additive into the fuel and a sensor for monitoring the additive level in the tank (see illustration 6.0). The fuel additive ensures combustion of solid particles at a temperature of 450°C. Without the additive, combustion of the particles requires a temperature of 550°C. Furthermore, softening of the solid particles occurs.





The pump delivers 80 liters per hour, and the additive delivery pressure is 3 bar. The additive delivery is controlled by the engine control unit, which is connected to the pump via a six-pin connector. Purpose of the plug contacts:

• 1 - terminal (-) of the additive level sensor in the tank;
• 2 - terminal (+) of the additive level sensor in the tank;
• 3 - 12V pump power supply;
• 4- "mass" (-) of the pump;
• 5 - not used;
• 6 - not used.

When the additive level in the tank is 0.3 liters, the level sensor is triggered and a corresponding message is displayed on the instrument panel or the corresponding signal lamp lights up.

The additive tank has a safety valve that provides ventilation of the tank and prevents liquid from leaking out (see illustration 6.0a).



The relief valve is located in the rear left wheel arch under the fender liner (see illustration 6.0b).

(Original is contained on the portal: www.PeugeotBook.ru)