NOVELTY - The system has a stirling engine (3) operatively coupled to a compressor (5) to operate the compressor. The engine thermally communicates with a heated heat transfer fluid in a waste heat loop (2), and is directly powered by waste heat transferred to the engine from the heated fluid. A chiller (7) is directly or indirectly connected to the heat loop and to an intake manifold (8) of an internal combustion engine (1) to cool the compressed air and communicate the cooled compressed air to an intake cylinder (1h) of the internal combustion engine.    USE - Waste heat recovery system for use with an internal combustion engine in a vehicle (claimed) e.g. truck, hybrid vehicle and gas-electric hybrid vehicle. Can also be used for a stationary application i.e. generator.    ADVANTAGE - The system facilitates recovering waste heat generated in an engine, so as to improve fuel consumption efficiency of the engine and improve other operating conditions of the engine without the need for electrical or other alternative fuel systems. The system provides regenerative energy by gas dynamics without miscellaneous losses in electrical systems and without weight attributed to the system. The system increases the thermal efficiency of the engine, thus reducing global warming and reducing air pollution emissions. The engine produces high torque at low revolutions per minute, thus prolonging the service life of the engine and lubricants, and extending combustion duration in the power stroke, and hence reducing fuel consumption of the vehicle and engine noise, and increasing power output of the vehicle. The system minimizes the size of an engine radiator, thus facilitating a smaller engine compartment and/or a more aerodynamic front end of the vehicle. The stirling engine and a propeller can automatically convert waste energy during deceleration or coasting into a useful form, thus enhancing carnot efficiency of the stirling engines.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a vehicle comprising a propulsion propeller.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a waste heat recovery system.    Internal combustion engine (1)    Intake cylinder (1h)    Waste heat loop (2)    Stirling engine (3)    Compressor (5)    Chiller (7)    Intake manifold (8)