OPTIMIZED SCR CATALYST CONTROL BY PERIODIC REGENERATION OF PARTICLE FILTER-CUSTOMIZER

摘要

1. A method for controlling a power plant of a motor vehicle containing an internal combustion engine (12), an exhaust pipe (11) for exhaust produced by the engine (12), in which a particulate filter (20), a catalyst (SCR) for selective catalytic reduction of nitrogen oxides are located (NOx) and a catalyst-adapted (SCR) reducing agent injection device (13), characterized in that the control method includes a method for controlling the amount (MS) of the reducing agent-based crystals in the exhaust mag trawls (11) and / or in the device (13) for injection and the amount (MN) of hydrocarbons contained in the catalyst (SCR), the control method comprising the periodic steps (E1) of regenerating the particle filter (20), each of which is started depending on criteria independent of the amount (MP) of soot contained in the particle filter (20) .2. The control method according to claim 1, characterized in that the stages (E1) of regeneration of the particle trap (20) start (E3) periodically with a frequency predetermined based on the operating time and / or distance traveled by the vehicle. 3. The control method according to claim 1, characterized in that the control method comprises at least a step (E4) of determining the amount (MS) of crystals based on a reducing agent in the exhaust line (11) and / or in the injection device (13), after which carry out the step (E1) of regeneration of the particle trap filter (20), if the trigger condition is checked, taking into account the number (MS) of crystals determined in the determination step (E4). 4. The control method according to claim 3, characterized in that the step (E1) of regeneration of the particle filter-catcher (20) is carried out in the case when the quantity (M