Apparatus, system and method for thermal management by deploying engine fueling on demand

A system comprising:

• a fuel pump powered by an engine and structured to provide fuel to the engine along a fuel flow path;
• a fuel metering device positioned along the fuel flow path and structured to divert excess fuel from the fuel flow path of the fuel upstream of the engine;
• and
• a controller structured to:
• receive information indicative of a temperature of exhaust gas emitted from the engine operating at an engine speed;
• determine that the temperature of the exhaust gas is below a predefined temperature threshold;
• determine an engine load sized to increase the temperature of the exhaust gas above the predefined temperature threshold;
• increase a load on the engine to the determined engine load while maintaining the engine at the engine speed by increasing at least one of a fuel flow rate and a fuel flow pressure of the fuel pump powered by the engine, wherein increasing at least one of the fuel flow rate and the fuel flow pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the engine speed;
• and
• divert the excess fuel from the fuel flow path of the fuel upstream of the engine.

An apparatus comprising:

• a catalyst health management (CHM) circuit structured to:
• receive information indicative of a temperature of exhaust gas emitted from an engine;
• and
• determine that the temperature of the exhaust gas is below a predefined temperature threshold;
• and
• a load generation circuit structured to:
• determine an engine load that increases the temperature of the exhaust gas above the predefined temperature threshold;
• increase a load on the engine to the determined engine load while maintaining the engine at a particular engine speed by increasing at least one of a fuel flow rate or a fuel flow pressure of a fuel pump, wherein increasing the at least one of the fuel flow rate or the fuel flow pressure of the fuel pump causes excess fuel to be provided to the engine than is necessary to maintain the engine at the particular engine speed;
• and
• control a fuel metering device to divert excess fuel from the fuel flow path of the fuel upstream of the engine.