INTERNAL COMBUSTION ENGINE AND METHOD OF ITS OPERATION Russian patent published in 1997 - IPC

FIELD: engine engineering. SUBSTANCE: in accordance with the first embodiment the internal combustion engine has combustion chamber 4, cylinder 1 with head 3, and piston 2 whose under-piston space 5 is in communication with the atmosphere. The head of the cylinder is provided with inlet valve 6 that connects combustion chamber 4 to the atmosphere when piston 2 moves to the top dead center and check valves 7 for discharging combustion products from the combustion chamber to the atmosphere. Combustion chamber 4 is provided with prechambers 8 inside each of which is valve 9 for supply of detonating gas and spark plug 10. The prechambers are preferably provided in the side wall of the cylinder above the piston when it is in the bottom dead center. The method of operation of the engine comprises connecting the combustion chamber to the atmosphere when the piston moves to the bottom dead center, sealing the combustion chamber, and supplying and igniting fuel mixture when the piston is in the vicinity of the bottom dead center. Detonating gas is used as fuel mixture. In according to the second embodiment the engine has combustion chamber 4 defined by cylinder 1 with head 3 and piston 2 whose under-piston sp[ace 5 is in communication with the atmosphere. Head 3 is provided with valve 9 for suppling fuel mixture and spark plug 10. The side wall of cylinder 1 above the piston when it is in the bottom dead center is provided with check valves 7 allowing combustion products to be discharged from the combustion chamber to the atmosphere. The method of operation of this engine comprises supplying fuel mixture to the combustion chamber, igniting the mixture when the piston approaches the bottom dead center, discharging combustion products from the combustion chamber through check valves when the piston approaches the bottom dead center. EFFECT: enhanced efficiency. 3 cl, 2 dwg