INTERNAL COMBUSTION ENGINE Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: internal combustion engine has first and second cylinders. The working volume of the first cylinder is greater than that of the second one. The second cylinder is provided in the head of the first cylinder. The first and second pistons are mounted for permitting reciprocation inside the first and second cylinders, respectively. The second piston is made up as a projection on the bottom (head) of the first piston. Inside the second piston is a combustion chamber with opening for air connected with the first cylinder and opening connected with the second cylinder. There is an inlet facility for supplying air to the first cylinder during the suction stroke of the first piston. There is also an inlet facility for supplying fuel to the second cylinder. Between the first and second cylinders is a passageway that allows the air to flow from the first cylinder to the second cylinder. The engine is provided with a means for control of air flow rate. EFFECT: enhanced efficiency. 8 cl, 2 dwg