Metal alloy piston for diesel type internal combustion engine to displace alternatively in direction and parallel direction to central axis of piston, has non-return valve allowing prevention of passage of liquid phase along direction

摘要

The piston has a heat pipe (20) whose hermetic enclosure (21) forms a closed fluid circulation loop with a condenser part (23), a supply pipe (24) and a return pipe (24'). The supply pipe supplies a liquid phase toward an evaporator part (22). The return pipe returns a vapor phase toward the condenser part. The heat pipe comprises a non-return valve (25) i.e. ball type valve, that is arranged in the supply pipe and allows passage of the liquid phase along direction and prevention of the passage of the liquid phase along another direction. The valve is formed with a passage section restriction.