Exhaust gas filtering process and unit with modulable heating

A process for after treatment of gases contained in exhaust of a Diesel engine in a vehicle comprising:

• providing at least one cylindrical filtering element, each cylindrical filtering element having a plurality of resistive elements, each resistive element comprising at least one turn of wire wrapped on one of the at least one cylindrical filtering element and engaging a cylindrical portion of the cylindrical filtering element and being disposed along a longitudinal axis of the cylindrical filtering element to heat a Portion of the cylindrical filtering element when electrical power is applied thereto;
• detecting fouling of the at least one filtering element;
• providing for electrical resources for providing power to the at least one resistive element;
• evaluating electrical resources available to provide electrical power to the at least one resistive element;
• and
• activating selectively the at least one resistive element as a function of the detected fouling and the evaluated electrical resources available to provide electrical power to the at least one resistive element under control of a control element.