Control of passive soot oxidation

A system for monitoring and heating exhaust gas to control passive soot oxidation comprising:

• a diesel particulate filter;
• a first temperature sensor positioned upstream of the diesel particulate filter, the first temperature sensor configured to detect the temperature of the exhaust gas delivered to the diesel particulate filter;
• a second temperature sensor positioned downstream of the diesel particulate filter, the second temperature sensor configured to detect the temperature of the exhaust gas flowing out of the diesel particulate filter;
• an auxiliary component configured to elevate the temperature of exhaust gas delivered to the diesel particulate filter when the auxiliary component is activated;
• a control module configured to predict a first temperature of the exhaust gas within the diesel particulate filter based on the temperature sensed by the first and second temperature sensors before the auxiliary component is activated and predict a second temperature of the exhaust gas within the diesel particulate filter based on the temperature sensed by the first and second temperature sensors before an activated auxiliary component is de-activated, the control module also being configured to activate the auxiliary component when the first temperature is below a predetermined passive soot oxidation temperature range, and deactivate the auxiliary component when the second temperature is within the predetermined passive soot oxidation temperature range.