Ammonia production system for an SCR system

A system for storing a reducing agent source (116), the reducing agent, to produce an ammonia production system (216) that is configured gaseous ammonia by means of cavitation, and a supply means (210) for gaseous ammonia in fluid communication with the ammonia production system (216) and an exhaust system (190) includes. The system can, the ammonia generation system (216) in response to the fact that a detected temperature of an exhaust gas of an exhaust system (190) is equal to or below a predetermined value, selectively activate. The ammonia production system (216) can use Ultrasonic or laser-induced cavitation to in response to the fact that the temperature of the exhaust gas of the exhaust system (190) is equal to or below the predetermined value to generate gaseous ammonia to be supplied to the exhaust system (190). When the temperature of the exhaust gas of the exhaust system (190) is above the predetermined value, a metering module (112) for metering the reducing agent into the exhaust system (190) can be activated.