System and process for storing an additive and injecting it into the exhaust gases of an engine

摘要

A system and a process for storing an additive solution and injecting it into the exhaust gases of an internal combustion engine. The system comprises at least one tank for storing the additive, one pump equipped with an inlet and an outlet and that is capable of generating a direct flow (in injection mode) or a reverse flow (in drawing off mode), at least two additive solution suction points, and an injector, wherein a first suction point is connected to the pump inlet and is only active when the pump operates in injection mode, and wherein the second suction point is connected to the pump outlet and is only active when the pump operates in drawing off mode.

主权项

1. A system for storing an additive solution and injecting it into the exhaust gases of an internal combustion engine, said system comprising:
at least one tank for storing the additive, one pump equipped with an inlet and an outlet and that generates a direct flow in an injection mode or a reverse flow in a drawing off mode, at least two additive solution suction points, and an injector, a first suction point is connected to the pump inlet that is only active when the pump operates in the injection mode, a second suction point is connected to the outlet of the pump that is only active when the pump operates in the drawing off mode, the second suction point being connected to the outlet of the pump via a calibrated orifice that is contained within the at least one tank, a main pocket that contains the first suction point, a secondary pocket that contains the second suction point, and a return line that discharges into said main pocket in said injection mode when said additive is injected from said injector.