Low-idle exhaust gas recirculation system

摘要

An exhaust recirculation system is provided for reducing NOx emitted from the power source at low-idle speeds. The power source has at least one combustion chamber, an intake manifold, a first exhaust manifold, and a second exhaust manifold. The exhaust recirculation system has a valve located in at least one of the first or second exhaust manifolds. The valve is moveable to increase the temperature of an exhaust gas by directing exhaust gas from the at least one of the first and second exhaust manifolds to the intake manifold. Furthermore, the exhaust recirculation system has a controller configured to determine at least one power source condition indicative of an exhaust temperature and move the valve in response to the determination.