Thermally insulated piston

Details Thermally insulated piston Thermally insulated piston

1983-05-18

1985-07-30

Feinberg, Craig R.

Internal-combustion engines

Combustion chamber

Having coating or liner

123193P, 92176, F01B 3108, F16J 100

Patent

active

045315027

ABSTRACT:
A thermally insulated piston for an internal combustion engine comprises a cast piston with a top wall having an annular recess, a cast iron annular cap in the recess, and a low thermal conductivity honeycomb structure between the cap and the bottom of the recess. The honeycomb structure has a plurality of cells, each formed of (stainless steel) foil filled with insulating material and brazed to the cap and to the bottom of the recess. This structure is a thermal barrier to the flow of heat from the cap to the main body of the piston, has high strength in compression and facilitates the adibatic expansion of gasses in the cylinder of the engine, particularly a diesel engine.

REFERENCES:
patent: 1719215 (1929-07-01), Faroy et al.
patent: 3730163 (1973-05-01), Elsbett et al.
patent: 4398527 (1983-08-01), Rynbrandt
patent: 4446698 (1984-05-01), Benson

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