F - Mech Eng,Light,Heat,Weapons – 02 – G
Patent
F - Mech Eng,Light,Heat,Weapons
02
G
60/30
F02G 1/04 (2006.01) F01B 11/04 (2006.01) F01B 19/02 (2006.01) F02G 1/043 (2006.01) F02G 1/05 (2006.01)
Patent
CA 1104354
ABSTRACT OF THE DISCLOSURE A free-piston regenerative engine includes a piston chamber having an upper portion, a lower portion and a bottom. A displacer piston is slidably mounted to move through a stroke within the upper portion of the piston chamber, the displacer piston including a top surface area and a bottom surface area. The engine also includes the series combination of a heater, a regenerator and a cooler in communication with the piston chamber and being referenced to the top surface area and the bottom surface area of the displacer piston. An inertial piston is slidably mounted within the piston chamber, and a diaphragm is positioned to move through a stroke at a lower portion of the piston chamber wherein a fluid chamber is defined between the diaphragm and the bottom of the piston chamber, whereby fluid is supplied to and discharged from the fluid chamber in response to movement of the displacer piston. The displacer piston remains stationary for a predetermined period of time at the end of the stroke to allow the diaphragm to complete its stroke prior to reversing the motion of the displacer piston. Variation of the predetermined period of time varies the engine frequency and output power.
337534
Malcolm Johnston & Associates
National Aeronautics And Space Administration
LandOfFree
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