Patent ID: 9644573
Date: 2017-05-09
CPC Classifications: F02M

Claim:
1. A system, comprising: an internal combustion engine receiving an intake stream from an intake manifold and delivering an exhaust stream having a temperature to an exhaust manifold; an EGR flow path fluidly coupling the exhaust manifold to the intake manifold, the EGR flow path including an EGR cooler path and an EGR cooler bypass path; a turbocharger compressing intake air on a compression side and receiving work from the exhaust stream on a turbine side; a compressed intake flow path fluidly coupling the compression side of the turbocharger to the intake manifold; an EGR bypass valve structured to selectively divide the EGR flow between the EGR cooler path and the EGR cooler bypass path; a charge air cooler bypass valve structured to reduce an amount of cooling of compressed intake air out of the compression side of the turbocharger; an aftertreatment component receiving the exhaust stream from the turbine side of the turbocharger, the aftertreatment component requiring at least intermittent exhaust stream temperature elevation; a fuel-consuming temperature generation system, and a controller configured to increase the temperature of the exhaust stream from the internal combustion engine for thermal management of the aftertreatment component by controlling a charge air cooler bypass valve and an EGR bypass valve, wherein the controller is further configured to achieve the increase in the temperature of the exhaust stream by first utilizing the EGR bypass valve to direct all EGR flow through the EGR cooler bypass path and, in response to an intake manifold temperature limit of the intake manifold, switching to utilize the charge air cooler bypass valve to reduce cooling of compressed intake air to achieve the increase in the temperature of the exhaust stream while the EGR bypass valve is closed to direct all the EGR flow through the EGR cooler path and, in response to a required increase in the temperature of the exhaust stream not being met while the EGR bypass valve is closed and the compressed intake air bypasses the charge air cooler, operating the fuel-consuming temperature generation system to achieve the increase in the temperature of the exhaust stream.