Patent ID: 7237531

Claim:
A power source, comprising: an air induction system configured to direct atmospheric air into the power source; an exhaust system configured to direct exhaust away from the power source; a recirculation system configured to redirect at least a portion of the exhaust from the exhaust system to the air induction system; and a valve arrangement in communication with the air induction system and the recirculation system, the valve arrangement including: a first valve element movable between a flow blocking position at which atmospheric air is restricted from flowing into a power source, and a flow passing position at which the atmospheric air is substantially free to flow into the power source; a second valve element movable between a flow blocking position at which exhaust from the power source is restricted from flowing into the power source, and a flow passing position the flow of exhaust into the power source is substantially unrestricted; an actuator configured to drive the first and second valve elements; and a planetary gear arrangement interconnecting the actuator and the first and second valve elements, the planetary gear arrangement being configured to drive the first and second valve elements separately.