Reciprocating engine; has two cylinders arranged at obtuse angle, which form common combustion chamber and pistons moving in cylinders in opposite directions

摘要

The engine has two cylinders (1,3) arranged at an obtuse angle, which form a common combustion chamber (5). Pistons (2,4) move in the cylinders in opposite directions. Both cylinders use common fuel intake (6) and ignition (7) devices and common valves (8). The compression ratio can be varied by moving one or both crankshafts (9,10).