Patent ID: 7794293

Claim:
A marine propulsion system provided in a water vessel comprising a bottom portion and a high flat portion, the system comprising: a single detonation device generating a flame with a shock wave by the detonation phenomena; control means for controlling the generation of the flame; and a detonation wave discharger, wherein the detonation device comprises: a detonation pipe having a straight hollow shape and a uniform inner diameter; a valve provided to one end of the detonation pipe, for introducing air and fuel into the inside of the detonation pipe; and an igniter provided at the side wall of the detonation pipe and adjacent to the one end of the detonation pipe, for igniting an air-fuel mixture in the detonation pipe, and wherein the control means controls: a) the valve to be opened to introduce air and fuel until the air-fuel mixture is filled in the detonation pipe; b) the valve to be closed; and c) the igniter to be energized for igniting the air-fuel mixture, to thereby induce the detonation phenomena in the detonation pipe so that a resultant detonation wave comprising a shock wave and the flame, having a speed of several thousands of meters per second, and a temperature and a pressure higher than what would be produce by combustion of the air-fuel mixture, and wherein the detonation wave discharger comprises a curved recess portion between the bottom portion and the high flat portion, wherein the curved recess portion is flush with the other end of the detonation pipe, and wherein the detonation pipe is inclined relative to the high flat portion to discharge the detonation wave from the other end of the detonation pipe downward into the water near the curved recess portion of the detonation wave discharger, and wherein the shape of the curved recess portion, the high flat portion, and the inclination of the detonation pipe effectively propel the water vessel, and wherein the control means controls the valve and the igniter to intermittently generate the detonation wave, wherein the frequency of the detonation wave is controlled according to a thrust or a speed of the water vessel.