Patent ID: 7775033

Claim:
System for evaluating a regeneration of particle filter integrated in an exhaust line of a motor vehicle engine, which comprises: means for determining the thermal power provided by the exhaust gases upstream of the particle filter during the regeneration phase thereof, and means for comparing this power with threshold values and for determining (i) a failed regeneration, (ii) a partial regeneration, or (iii) a total regeneration of the particle filter as a function of this comparison wherein the means for determining the thermal power are associated with means for determining the flow rate of the gases in the exhaust line and of the temperature thereof upstream of the particle filter and comprise: means for calculating the thermal capacity of the exhaust gases, Cp, according to the equation: c p = 1.07 *  39.06 - 512.79 * T - 1.5 + 1072.7 * T - 2 - 820.4 * T - 3  28.013 in which T represents the temperature of the gases upstream of the particle filter, and means for calculating the thermal power provided P th according to the equation: P th =Gas flowrate*( T upstream PF )* Cp where Gas flowrate represents the flow rate of the gases in the exhaust line, (T upstream PF) represents the temperature of the exhaust gases upstream of the particle filter, and Cp is the thermal capacity of the gases calculated previously, and wherein the determination means comprise means for performing the average of the values of the thermal powers calculated at each time step during regeneration.