Patent ID: 6955162

Claim:
An internal combustion engine system comprising: an internal combustion engine; an air intake system to the internal combustion engine; an exhaust system from the internal combustion engine; an exhaust gas recirculating line having an inlet from the exhaust system and an outlet into the air intake system; a compressor system in the exhaust gas recirculating line for drawing exhaust gas from the exhaust system and boosting exhaust gas pressure for delivery to the air intake system; an engine controller and engine sensor package for detecting when the internal combustion engine is under negative and positive loads; a transducer coupled to receive mechanical energy from the internal combustion engine; energy storage means for receiving energy output by the transducer and storing the energy; means responsive to detection of a negative load on the internal combustion engine for coupling the energy output of the transducer to the energy storage means for storage as potential energy; and means responsive to detection of a positive load on the internal combustion engine for tapping the energy storage means for energy for driving the compressor system in the exhaust gas recirculating line.