Abstract: A diesel engine system is provided with an exhaust passage having a diesel particulate filter disposed in the passage. An exhaust gas recirculation passage is connected to the exhaust passage at a downstream location of the diesel particulate filter and in communication with the air intake passage. By locating the connection to the exhaust passage at a location downstream from the diesel particulate filter, the exhaust gas recirculation passage and the exhaust gas recirculation cooler disposed therein are isolated from soot contamination.