Patent ID: 6418708
Filing Date: 2002-07-16
Classification: F02G

Abstract:
An engine comprising:at least one positive displacement chamber; a reciprocating piston disposed in said at least one positive displacement chamber; an external combustion chamber in communication with the positive displacement chamber for containing a mixture of compressed gas; an ignitor in the combustion chamber constructed and arranged to ignite a fuel in the combustion chamber; at least one valve constructed and arranged to control the flow of the compressed gas from the combustion chamber into the positive displacement chamber; at least one exhaust valve constructed and arranged to control the flow of expanded gas from the positive displacement chamber; a high-pressure fuel vessel in communication with the combustion chamber; at least one valve for controlling the flow of pressurized fuel from the high-pressure fuel vessel to the combustion chamber; at least one external valve constructed and arranged to fill the high-pressure fuel vessel with compressed fuel from an external fuel source; a high-pressure air vessel in communication with the combustion chamber; at least one valve for controlling the flow of pressurized air from the high-pressure air vessel to the combustion chamber; and at least one external valve constructed and arranged to fill the high-pressure air vessel with compressed air from an external pressurized air source.