US 12,065,959 B2
Thermal management of exhaust gas with charge air heating
Timothy C. Ernst, Columbus, IN (US); and Daniel J. Mohr, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Sep. 9, 2022, as Appl. No. 17/930,838.
Prior Publication US 2024/0084727 A1, Mar. 14, 2024
Int. Cl. F02B 29/04 (2006.01); F02B 29/02 (2006.01); F02M 26/04 (2016.01); F02M 26/17 (2016.01)
CPC F02B 29/0418 (2013.01) [F02B 29/02 (2013.01); F02B 29/0443 (2013.01); F02M 26/04 (2016.02); F02M 26/17 (2016.02)] 16 Claims
OG exemplary drawing
 
1. 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, wherein the heat transfer system includes:
a working fluid compressor for compressing the working fluid;
a first condenser in the intake to transfer heat from the working fluid to the charge air and a second condenser to transfer heat from the working fluid to the environment;
a first evaporator to transfer heat to the working fluid and a second evaporator to transfer cool air flow to an air conditioned space; and
wherein working fluid flow from an outlet of the working fluid compressor is regulated to the first condenser and the second condenser.