Internal combustion engine transient response

An auxiliary system for controlling an enthalpy of air to a turbine of a turbocharger of an internal combustion engine comprising:

• a motive air device configured to receive at least some of the air and produce an airflow of the at least some of the air;
• an auxiliary heat source in selective fluid communication with the motive air device and configured to heat the airflow;
• a valve assembly positioned between the motive air device and the auxiliary heat source, wherein the valve assembly comprises a three-way valve configured to selectively regulate the airflow to ambient according to at least one operation mode;
• and
• a controller configured to control operation of the auxiliary heat source and control the airflow to the turbine based upon at least one of a temperature, a pressure and a mass flow rate of the air upstream of or downstream from the turbine, and further configured to control the valve assembly to regulate the airflow from the motive air device to the auxiliary heat source.

A method of controlling one or more properties of air to a turbine of a turbocharger of an internal combustion engine comprising:

• flowing at least a portion of the air to the turbine from a supplemental positive airflow generating device;
• heating the at least the portion of the air to the turbine with an auxiliary heat source;
• sensing at least one of at least one of a temperature, a pressure and a mass flow rate of the air upstream or downstream of the turbine;
• based upon the sensing, controlling, with a computing device, the flowing of the at least the portion of the air to the turbine;
• and
• based upon the sensing, controlling, with the computing device, an amount of heating applied by the auxiliary heat source to the at least the portion of the air to the turbine.

An internal combustion engine comprising:

• an engine block including a plurality of combustion chambers, each of the plurality of combustion chambers being in fluid communication with an air intake manifold and an exhaust manifold;
• a turbocharger including a compressor shafted to a turbine, wherein the turbine is in fluid communication with the exhaust manifold;
• and
• an auxiliary system comprising:
• a motive air device in selective fluid communication with and configured to produce an airflow to the turbine;
• an auxiliary heat source in selective fluid communication with the motive air device and configured to heat the airflow produced by the motive air device;
• and
• a controller configured to control operation of the auxiliary heat source and control the airflow to the turbine based upon at least one of a temperature, a pressure and a mass flow rate of a combined airflow including an exhaust airflow from the exhaust manifold and the airflow at a location upstream of or downstream from the turbine.