Cooling of diesel engine pistons

Details Cooling of diesel engine pistons Cooling of diesel engine pistons

1980-06-10

1982-05-25

Feinberg, Craig R.

Internal-combustion engines

Cooling

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

123193P, F01P 310

Patent

active

043311075

ABSTRACT:
A Diesel engine piston conventionally has an annular conduit, at the level of the uppermost piston ring, through which lubricating oil circulates. The oil enters and leaves the annular conduit through two longitudinal holes in the piston. According to this invention, a branch conduit extends radially inwardly from the annular conduit to bring oil flow beneath the central part of the piston crown, thereby cooling the latter. The branch conduit is especially useful with a piston having a combustion chamber in its head. The usual discharge hole from the annular conduit is blocked, and a substitute discharge hole, at the end of the branch conduit, opens into the interior of the piston.

REFERENCES:
patent: 2772933 (1956-12-01), Nichols
patent: 3323503 (1967-06-01), Grosshans et al.
patent: 4186692 (1980-02-01), Kawamura et al.

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