STERLING ENGINE Russian patent published in 1994 - IPC

FIELD: engines. SUBSTANCE: engine has cylinder 1 and displacing and working pistons 2 and 3 respectively positioned inside, the pistons separate hot and cold cavities 4 and 5 respectively in the cylinder. A cooler has cooling jacket 6 with cooling water feed and bleed branch pipes 8 and 9. The cooling jacket has lower and upper manifolds 16 and 17. Heater 10, regenerator 11 and cooler 12 are mounted in a manifold connecting the hot and cold cavities. The cooler is made in the form of annular channels formed by bushes 14 inserted into holes 15. The cooler ribbed channels increase the heat exchange surface. Inner holes and ribs in the bushes, slots between the bushes and a radial clearance at the periphery of the cooling jacket also increase the heat exchange surface. EFFECT: improved efficiency. 6 cl, 3 dwg