Systems and methods for heating an aftertreatment system

A method for warming an aftertreatment system of an engine system while an engine of the engine system is not running, the engine system including an electric compressor, the method comprising:

• starting the electric compressor using stored electrical energy;
• passing air through an exhaust gas recirculation system of the engine system to at least a portion of the aftertreatment system, wherein the air is passed in a direction opposite to a direction of exhaust flow through the exhaust gas recirculation system when the engine of the engine system is running;
• wherein the electric compressor is part of a turbocharger that further includes a turbine, and the air passed through the exhaust gas recirculation system is allowed to bypass the turbine via a turbine bypass channel, wherein the turbine bypass channel includes a valve configured to direct air to the various positions of the aftertreatment system, and wherein the aftertreatment system includes a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and a selective catalytic reduction (SCR) system, and the valve is configured to direct air passed through the exhaust gas recirculation system to a position upstream of the DOC, the DPF, and the SCR system, and an another position upstream of the SCR system and downstream of the DOC and the DPF.