IC engine with cooled exhaust gas recirculation system for use with e.g. a highway truck has exhaust valve controlled according to map e.g. normal and high coolant temperature strategies

摘要

The engine (30) includes a control system which interprets a signal sensing the operating parameter within a controller. The controller causes an exhaust valve regulator to move between an open position and a closed position. A number of paths or maps, for example, one being a normal coolant temperature strategy and another being a high coolant temperature strategy is used.