Patent ID: 8398444

Claim:
A nautical engine comprising two combustion chambers provided with a first opening, normally closed by a first valve, for feeding an air and fuel mixture into said combustion chambers, at least one spark plug for igniting the mixture, at least one second opening, normally closed by a second valve, for exhausting the exhaust gas derived from the ignition of the mixture, feeding means adapted to feed at least one combustion chamber by means of said at least one first opening, a control device adapted to control said feeding means for feeding the mixture into the combustion chamber and for igniting the spark plug for igniting the mixture, said feeding means comprising a nozzle adapted to spray said mixture at a pressure to open said first valve of the chamber, and, after having closed said first opening of the first valve, said second valve for exhausting the gas can be opened by the gas produced by the ignition of said mixture in the combustion chamber, said combustion chambers being integral with at least one propulsion tube immersed in water and to which the gas from the combustion chamber leads for compressing and expelling the water present in at least one propulsion tube after having closed said second opening of the second valve, said two combustion chambers being fed by mutually reciprocating feeding means, the nautical engine comprising a hollow chamber arranged between said second opening of the combustion chamber and said propulsion tube, said hollow chamber being normally immersed in water and being closed by a segmented element comprising a plurality of rotational segments arranged reciprocally in sequence, said segments opening to let in water due to the vacuum caused by the ejection of exhaust gas through the propulsion tube.