1. Controlling Combustion Chamber Squish: The deflector shape creates a specific contour in the piston crown that helps control the movement and compression of the air-fuel mixture during the compression stroke. This controlled squish motion enhances mixing and promotes more efficient combustion.
2. Directing Combustion Gases: The deflector shape also directs the hot combustion gases, especially during the power stroke, away from critical engine components such as the valves and piston rings. This helps prevent excessive heat buildup in these areas, reducing the risk of damage and improving overall reliability.
By optimizing the flow and direction of combustion gases, deflector-shaped crowns contribute to improved engine efficiency and performance. They are often employed in high-performance engines, diesel engines, and some modern gasoline engines to achieve better fuel economy and power output.
