System for assisting the regeneration of a particle filter integrated into an exhaust line of a motor vehicle diesel engine

摘要

A system for assisting the regeneration of a particle filter integrated into an exhaust line of an engine that admits air into the engine and includes a valved return that selectively closes a path that recycles exhaust gas from the engine to the engine inlet. An additive is added to fuel, the additive deposited onto the particle filter to lower the combustion temperature of the particles trapped in the filter. A control system monitors the regeneration system and triggers a regeneration phase of the particle filter by combustion of the particles trapped in the engine, at the same time initiating a phase of multiple injections of fuel into the cylinders of the engine during their expansion phase. The control system further closes the recycling path during a regeneration phase of the particle filter to enable the monitoring of the composition of the gases at the inlet of the particle filter.