Abstract: A method of heating an exhaust gas in an exhaust aftertreatment system including a Diesel Oxidation Catalyst (DOC) and a diesel particulate filter (DPF) is provided. The method includes heating the exhaust gas to a predetermined temperature to increase NO2 generation in the DOC when the DPF is not actively regenerated, and heating the exhaust gas to reduce an exhaust temperature gradient when the DPF is actively regenerated. The exhaust temperature gradient is reduced by providing more heat proximate a wall of an exhaust conduit and less heat proximate a center of the exhaust conduit.

Abstract: A smart heating system is described that generally comprises at least one heater element, optionally, at least one temperature sensor, a set of predetermined or predictable performance information used to control the heating system; and, optionally, an electronic conditioning module (ECU) capable of storing and processing the performance information. The performance information may be stored as written text, a bar code, a data matrix, or a radio frequency identification (RFID) tag. The smart heating system heating system may further comprises a LIN or a CAN bus capable of providing a communication pathway between at least two of the system components.

Abstract: A post injection control system for regulating diesel particulate regeneration of a diesel particulate filter (DPF) with a diesel engine includes a mass airflow sensor that generates a mass airflow signal. A temperature sensor senses the temperature of exhaust and generates an exhaust temperature signal. And a control module commands post injection at a post injection value determined from the mass airflow signal and at a post injection rate determined from the exhaust temperature signal.