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AssigneeClemson University
InventorsMichael T. Nelson, Alvon C. Elrod
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A method is provided for improving the performance of an internal combustion engine, comprising the steps of inducting a charge of fluid into the combustion chamber of the engine, holding the intake valve of the combustion chamber open during a portion of the compression stroke of the piston in the combustion chamber, expelling a portion of the inducted charge from the combustion chamber by movement of the piston in its compression stroke while the intake valve is held open, preventing the expelled portion of the inducted charge from communicating with the atmosphere by providing a check valve between the induction manifold and the atmosphere, the check valve only permitting flow in the direction from the atmosphere into the induction manifold; and closing the intake valve during the remainder of the compression stroke and after the portion of the induction charge is expelled.
A method for improving engine performance for a multi-cylinder internal combustion engine, the engine having more than one combustion chamber with a member for varying the volume of same, a crankshaft, a single induction manifold disposed between the atmosphere and at least two combustion chambers, at least one intake valve disposed between each combustion chamber and the induction manifold, at least one of said valves beginning to open to start an induction process when the angular position of the crankshaft is at an opening angular position for said valve and the induction process being ended when the crankshaft is at a closing angular position and the last one of said intake valves closes, and a variable valve timing system for changing the timing of the induction process via control of at least one of said valves in compliance with predetermined operating conditions of the engine, the variable valve timing system including a camshaft having at least one splittable cam member with camlobe members for actuating the at least one intake valve, the method comprising:
A method of using a variable valve timing system to improve performance of a multi-chamber internal combustion engine, the engine having more than one combustion chamber with a movable member in each chamber for varying the volume of same, a crankshaft, a single induction manifold disposed between the atmosphere and at least two combustion chambers, at least one intake valve disposed between each combustion chamber and the induction manifold, at least one of said intake valves beginning to open to start the induction process when the angular position of the crankshaft is at an opening angular position and the induction process being ended when the angular position of the crankshaft is at a closing angular position and the last one of said intake valves closes, and a variable valve timing system capable of changing the timing of the induction process, the method comprising:
A method for improving engine performance for a multi-chamber internal combustion engine, the engine having more than one combustion chamber with a member in each chamber for varying the volume of same, a crankshaft, a single induction manifold disposed between the atmosphere and at least two combustion chambers, at least one intake valve disposed between each combustion chamber and the induction manifold, at least one of said valves beginning to open to start the induction process when the angular position of the crankshaft is at an opening angular position for said valve and the induction process being ended when the crankshaft is at a closing angular position and the last one of said intake valves closes, and a variable valve timing system for changing the timing of the induction process via control of at least one of said valves in compliance with predetermined operating conditions of the engine, the variable valve timing system including a camshaft having at least one cam member for actuating the at least one intake valve and being rotatable with respect to the camshaft, the method comprising:
A method of improving the performance of a multi-changer internal combustion engine, the engine having more than one combustion chamber with a movable member in each chamber for varying the volume of same, a crankshaft, a single induction manifold disposed between the atmosphere and at least two combustion chambers, at least one intake valve disposed between each combustion chamber and the induction manifold, at least one intake valve beginning to open to start the induction process when the angular position of the crankshaft is at an opening angular position and the induction process being ended when the angular position of the crankshaft is at a closing angular position and the last one of said intake valves closes, the method comprising:
Dependencies are inferred from the claim text.