Patent ID: 8919098
Filing Date: 2014-12-30
Classification: F01N,F02D

Abstract:
1. A diesel engine, comprising: a particulate filter set in an exhaust line of the engine, and an electronic control unit for controlling fuel injectors associated to cylinders of the engine, said control unit programmed for activating—when an amount of particulate accumulated in said filter higher than a particulate threshold value is detected or estimated —a modality of control of the injectors that causes an automatic regeneration of the filter by an increase in a temperature of exhaust gases sent to the filter sufficient for burning the particulate in the filter; the electronic control unit programmed for activating an alarm condition and inhibiting the automatic regeneration mode and enabling simultaneously an on-demand regeneration mode activatable manually by a driver when said electronic control unit detects an oil value lower than a pre-set threshold of a parameter identifying a quality of the engine lubricating oil, the parameter calculated by a pre-set algorithm identifying the quality of the oil; a manual control actuator for activation of the on-demand regeneration mode; said electronic control unit programmed for activating said alarm condition when said electronic control unit detects; an exceedance of a pre-set event threshold value of a number of unfavorable events in which the automatic regeneration mode is interrupted before a completion of the automatic regeneration of the filter; said electronic control unit programmed in such a way that, in a case of detection of the number of unfavorable events higher than the event threshold value, the alarm condition with inhibition of the automatic regeneration mode and enabling of the on-demand regeneration mode is activated only in the case where the electronic control unit also detects a resistance to a flow of the exhaust gases through the particulate filter higher than a resistance threshold value.