System for injecting urea solution on exhaust line of internal combustion engine, has reservoir for urea, and has nozzle that is injected in exhaust line

摘要

The system (10) has a reservoir (14) for the urea, and has a nozzle (26) that is injected in an exhaust line (12). An electromagnetic valve (22) is provided for blocking and releasing of a current connection for nozzle. A circulating line (16) is provided for the magnetic valve. A control unit (30) is provided for controlling the electro-magnetic valve.