Operation of a four-stroke internal combustion engine usually includes an intake stroke, a compression stroke, a power stroke and an expansion stroke. In normal operation, during the intake stroke of the internal combustion engine, an intake valve is opened as a piston is moved downward through a cylinder. At low speed or load engine conditions, a swirl effect or rotation of a fluid mixture around an axis of the cylinder may be used to promote engine performance.
Alternatively, at high speed or load engine conditions, a tumble effect for a fluid generally represents the fluid mixture spinning around the cylinder along an axis parallel to the crankshaft. Effective fuel economy and performance of an engine may be affected if the tumble effect or swirl effect is not managed properly or applied at an appropriate operation cycle of the engine.