Four-stroke engine piston having a shut-off device, one component of the movement of which is parallel to the shut-off surface

摘要

The use of a shut-off device (6) the closure element of which has both a component of the opening or closing movement perpendicular and parallel to the shut-off surface makes it possible to facilitate gaseous exchanges between the combustion chamber (4) and the intake port (5). Several gas intake orifices (2) are shut off by the same element (6). <IMAGE>