Thermal management of exhaust gas with charge air heating
AssigneeCummins Inc.
InventorsTimothy C. Ernst, Daniel J. Mohr
Life of this patent
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Abstract
Heating of the charge air in an intake is provided by a working fluid that is circulated through the intake to exchange heat with the charge air. The heated charge air can be used in response to a thermal management condition for an exhaust gas produced by operation of the internal combustion engine.
Claims22
A system for thermally managing an exhaust gas of an internal combustion engine including a plurality of cylinders, the system comprising:
- an exhaust for receiving the exhaust gas produced by combustion in the plurality of cylinders, and at least one aftertreatment device in the exhaust;
- an intake that provides a charge air to the plurality of cylinders, the intake including a charge air cooler (CAC) for cooling the charge air;
- and
- a heat transfer system that is configured to heat the charge air in the intake by a heat exchange to the charge air from a working fluid that is circulated through the intake.
A method of thermally managing an internal combustion engine that includes a plurality of cylinders and an aftertreatment device in an exhaust, the method comprising:
- operating the internal combustion engine to receive a charge air from an intake and produce an exhaust gas by combustion in at least a portion of the plurality of cylinders;
- determining a thermal management condition associated with operation of the internal combustion engine;
- and
- heating the charge air in the intake by a heat exchange to the charge air from a working fluid that is circulated through the intake in response to the thermal management condition.
A heat transfer system for heating a charge air in an intake of an internal combustion engine, the heat transfer system comprising:
- charge air plumbing configured to provide the charge air to the intake of the internal combustion engine;
- and
- a heat pump loop configured to circulate a working fluid to heat the charge air in the charge air plumbing.
Dependencies are inferred from the claim text.