Post-injection exhaust gas cleaning system e.g. for diesel IC engine

摘要

An exhaust gas cleaning system for an IC engine uses fuel injection with the ability to inject fuel during the output stroke of the engine. The control system has a computer to calculate the duration that the injectors are active and when they should be activated. The injectors have such a construction as to allow a fuel quantity to be injected at a certain time and for a certain duration, independently of the previous injection cycle. The injectors can be kept with a fixed flow rate during the open period. The injectors can perform a main injection, followed by a secondary one.