Abstract: A system and method for controlling an exhaust gas recirculation system (10) on an electronically controlled, turbocharger (18) equipped internal combustion engine (12) having two or more actuating devices (84,86). In the disclosed embodiments, the actuating devices (84,86) may include an exhaust gas recirculation valve (40), a turbocharger back pressure valve (44), the vane actuators (46) in a variable geometry turbocharger (48), or an air intake throttle valve.

Abstract: A closed loop control system for an exhaust gas recovery flow in an internal combustion engine having an intake air pressurizing device is provided. The closed loop control system includes an engine controller connected to an intake air mass flow sensor, an engine operation sensor, and an intake air throttle valve for controlling the intake air mass flow rate. In addition, the controller is operatively connected to a variable gas pocket valve for selectively controlling exhaust gas feedback in conjunction with the intake air throttle valve. The variable gas pocket valve and the intake air throttle valve may be actuated in response to the control system parameters to provide accurate control of exhaust gas recovery flow to provide reduced emissions of unburned fuel and particulate matter from the engine.

Abstract: A system and method for controlling an exhaust gas recirculation system in an internal combustion engine having two or more actuating devices on a supercharger-type pressure-charged internal combustion engine, or, in a turbocharger equipped pressure-charged internal combustion engine. In the disclosed embodiments, the actuating devices may include a variable gas pocket valve, an air intake throttle valve, an exhaust gas recirculation valve, a turbocharger back pressure valve, or the adjustable turbine blades in a variable gas turbine. In the disclosed embodiments, the control system includes a pair of actuators operatively coupled to an engine controller. The second actuator is operatively responsive to the first actuator when the first actuator command signal exceeds prescribed actuator limits.