Patent ID: 8109082
Filing Date: 2012-02-07
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. System for assisting regeneration of a particulate filter disposed in an exhaust line of a motor vehicle diesel engine, and associated with an oxidation catalyst disposed in line, the engine being equipped with fueling means capable of injecting fuel into the cylinders thereof during their expansion phase, during post-injections, said system comprising: control means for the fueling means that control the fueling means using a particulate filter regeneration strategy in which the control means switch the fueling means between (i) a first operating mode with a first type of post-injection to activate the oxidation catalyst, and (ii) a second operating mode with a second type of post-injection to make the activated catalyst produce an exotherm in order to regenerate the particulate filter, wherein the system comprises a single temperature sensor, the single temperature sensor is disposed in the exhaust line upstream of the oxidation catalyst, the single temperature sensor is connected to the control means, and the control means switch the fueling means between the first and second operating modes as a function of the temperature only acquired upstream of the oxidation catalyst by the single temperature sensor.