PISTON WITH AN OPEN COOLING CHAMBER HAVING A FLOW-EFFECTIVE OIL GUIDING SURFACE AND METHOD FOR COOLING SAID PISTON

摘要

An internal combustion engine piston having a cooling chamber open to in a direction toward of pin boss bores. The cooling chamber having at least one oil guiding surface having a slope. On directing a cooling oil spray stream onto the at least one sloped oil guiding surface, there is increased heat transfer from the piston to the cooling oil. In one example, the oil guiding surface slope has a concave or convex curvature.