System and method for maintaining operation of a regenerative soot filter

A method performed by an electronic control system for a powertrain system that includes an internal combustion engine and an exhaust system, the method comprising:

• determining a pressure differential across a regenerative soot filter of the exhaust system based on an upstream exhaust pressure measured upstream of the regenerative soot filter and a downstream exhaust pressure measured downstream of the regenerative soot filter;
• determining a counter value representing a regeneration status of the regenerative soot filter based on an exhaust temperature measured along an exhaust flow path of the exhaust system and the pressure differential across the regenerative soot filter;
• and
• outputting the counter value representing the regeneration status via an operator interface of the powertrain system.

A computing system for controlling a powertrain system that includes an internal combustion engine and an exhaust system, the computing system comprising:

• a logic machine;
• and
• a storage machine having instructions stored thereon executable by the logic machine to:
• determine a pressure differential across a regenerative soot filter of the exhaust system based on an upstream exhaust pressure measured upstream of the regenerative soot filter and a downstream exhaust pressure measured downstream of the regenerative soot filter;
• determine a counter value representing a regeneration status of the regenerative soot filter based on an exhaust temperature measured along an exhaust flow path of the exhaust system and the pressure differential across the regenerative soot filter;
• and
• output the counter value representing the regeneration status.