Cooling structure of diesel engine piston

Details Cooling structure of diesel engine piston Cooling structure of diesel engine piston

1995-05-31

1997-01-21

Okonsky, David A.

Internal-combustion engines

Cooling

Internal cooling of moving parts; e.g., hollow valves,...

92186, F01P 104

Patent

active

055951457

ABSTRACT:
A diesel engine piston, which exhibits high resistance to heat load, has a cooling cavity formed circumferentially around and outwardly of the outer periphery of a reentrant combustion chamber. A cooling liquid inlet passageway through which cooling liquid is supplied is provided in the piston body. The inside diameter of the cooling cavity is smaller adjacent to the top of the piston than adjacent to the bottom of the piston, and the cross-sectional area of the cooling cavity gradually increases from the bottom of the cooling cavity toward the top of the cooling cavity. A funnel wall, which projects downwardly toward the bottom of the piston, serves as the inlet of the cooling liquid inlet passageway. A distributing member, positioned within the cooling cavity directly above the outlet of the cooling liquid inlet passageway, splits the cooling liquid into two streams for passage in opposite directions through two segments of the cooling cavity.

REFERENCES:
patent: 4517930 (1985-05-01), Nakano et al.
patent: 4715335 (1987-12-01), Elsbett et al.
patent: 4867119 (1989-09-01), Cooper et al.
patent: 5065706 (1991-11-01), Zvonkovic

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