Reducing agent feed system for vehicle internal combustion engine nitrogen oxides catalytic converter comprises storage container for solid agent and gasifier

摘要

The system (16) for delivering a reducing agent to an NOx catalytic converter consists of a main storage container (20) for a solid reducing agent, a unit (30) for producing reduction gases for gasifying or liquefying the solid agent using heat from the engine cooling system, an auxiliary container (40) for temporary storage of the gasified or liquefied reducing agent, and a unit for calculating the required speed of delivery for the reducing agent to the NOx catalytic converter. The auxiliary storage container is fitted with a detector for the remaining quantity of fluid reducing agent, linked to the liquefying unit (30), and a pressure detector (43) linked to an alarm that is set off if the design pressure level is exceeded.