System for assisting the regeneration of a particle filter comprised in the exhaust pipe of a diesel vehicle engine

The filter (7) regeneration is obtained by multiple injections of fuel to the engine (1) cylinders during slowing of the engine. The controller (17) delivers a pilot injection 40 degrees before top dead-center (TDC) and 10 after TDC, then delivers a main injection between 25 degrees before TDC and 20 degrees after TDC, and multiple injections between 10 degrees after TDC and 180 degrees after TDC.