Patent ID: 8291872
Filing Date: 2012-10-23
Classification: F02B,F02M,Y02T

Abstract:
1. A method of operating an internal combustion engine having a piston reciprocally movable in a cylinder to provide a six-stroke cycle, the method comprising the steps of: performing a first stroke cycle in which a piston travels in a cylinder in a direction toward a crankshaft, with an intake valve of the cylinder in an open condition, an exhaust valve of the cylinder in a closed condition, and an air-fuel mixture introduced via the intake valve into the cylinder; performing a second stroke cycle, in which the intake valve and the exhaust valve are both closed, and the piston travels in the cylinder in a direction away from the crankshaft to compress the air-fuel mixture, with combustion of the fuel-air mixture beginning towards the end of the compression stroke; performing a third stroke cycle, in which the intake valve and the exhaust valve are both closed, with the piston traveling toward the crankshaft while the air-fuel mixture is combusting and expanding; performing a fourth stroke cycle having: performing a fifth stroke cycle, in which the intake valve and the exhaust valve are closed, with the piston traveling toward the crankshaft while the water is vaporized and steam pressure forces the piston towardly; and performing a sixth stroke cycle, in which the intake valve is closed and the exhaust valve is open, in which the piston traveling away from the crankshaft, and in which the contents of the cylinder are exhausted from the cylinder via the exhaust valve.