Storage and dispensing system for additive to be injected into exhaust gas of engine, includes non-return valves installed along supply line branches that connect two tanks to pump, in which valves are calibrated accordingly

摘要

The system includes two tanks (1,2) set parallel to each other and which stores the additive. Supply line branches (8',8'') connect the tanks to a pump (4), and are individually installed with non-return valves (10,11). The valves are calibrated such that valve along the supply line branch from the tank (1) is normally open but closes when the tank is empty, while the valve along the supply line branch from the tank (2) is normally closed but opens when the valve from the tank is closed or when the branch coming from this tank (1) is blocked.