Exhaust gas heat exchange system for an internal combustion engine

Abstract

An exhaust gas heat exchange system for an internal combustion engine ( ) includes an intake manifold ( ) including an inlet ( ) for recirculating exhaust gases and an exhaust manifold ( ) having at least one inlet ( ) for receiving exhaust gas from the engine ( ) and an outlet ( ), ( ), for discharging exhaust gas and spaced from the inlets ( ). An exhaust gas heat exchanger ( ) includes a first flow path having an inlet ( ) connected to the exhaust manifold ( ) to receive exhaust gas therefrom, an outlet ( ) for discharging cooled exhaust therefrom and a second flow path in heat exchange relation with the first flow path for receipt of a coolant whereby exhaust gas flowing in the first flow path may be cooled. An exhaust valve ( ) has a first inlet ( ) connected to the first flow path of the heat exchanger ( ), a second inlet ( ) connected to the exhaust manifold ( ) and an outlet ( ) connected to the intake manifold ( ) together with a valve mechanism having at least one movable component ( ) movable between positions connecting the first inlet ( ) and the outlet ( ) and connecting the second inlet ( ) and the outlet ( ). An actuator ( ) is connected to the exhaust valve ( ) for operating the same.