Emissions management for diesel series hybrid powertrains

A system for managing emissions of a hybrid vehicle, the system comprising:

• a battery;
• and
• a controller coupled to the battery, the controller comprising at least one processor and at least one memory device storing instructions that, when executed by the at least one processor, cause the controller to perform operations comprising:
• determining an end of a drive cycle of the hybrid vehicle;
• receiving a temperature of an aftertreatment system responsive to determining the end of the drive cycle of the hybrid vehicle;
• determining an ammonia-to-NOx ratio (ANR) of the aftertreatment system responsive to determining the end of the drive cycle of the hybrid vehicle;
• and
• managing an operation of an engine of the hybrid vehicle to at least one of (i) lower the temperature of the aftertreatment system responsive to determining that the temperature of the aftertreatment system is at or above a first threshold or (ii) lower the ANR of the aftertreatment system responsive to determining that the ANR of the aftertreatment system is below a second predefined threshold.

A method for managing emissions of a hybrid vehicle, the method comprising:

• activating, by one or more processors, an air mover to move air through an aftertreatment system responsive to determining that an ammonia level in the aftertreatment system is below a first predefined threshold;
• increasing, by the one or more processors, a temperature of the moving air relative to a current temperature of the moving air responsive to activating the air mover;
• activating, by the one or more processors, a doser of the aftertreatment system responsive to the temperature of the moving air being at or above a second predefined threshold;
• and
• starting or enabling a starting of, by the one or more processors, an engine of the hybrid vehicle responsive to the ammonia level of the aftertreatment system being at or above the first predefined threshold.