Thermal management of exhaust gas via cylinder deactivation

A system, comprising:

• a controller coupled to an exhaust gas aftertreatment system coupled to a plurality of combustion cylinders of an engine, wherein the controller is structured to:
• determine that the engine is operating in a low load operating condition;
• deactivate a combustion cylinder based on the low load operating condition;
• and
• increase a speed or a torque of the engine to increase the exhaust gas temperature while the combustion cylinder is deactivated.

A system, comprising:

• a controller coupled to an exhaust gas aftertreatment system coupled to a plurality of combustion cylinders of an engine, wherein the controller is structured to:
• deactivate a combustion cylinder based on at least one of a determination that the engine is operating in a low load operating condition for a certain period of time, an aftertreatment system component temperature being below a temperature threshold, an aftertreatment system catalyst temperature being below a temperature threshold, or an exhaust gas temperature being below a temperature threshold;
• and
• increase an engine exhaust gas temperature via at least one thermal management command.