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A compound cycle engine system has a rotary engine, which rotary engine generates exhaust gas. The system further has a compressor for increasing the pressure of inlet air to be supplied to the engine to a pressure in the range of from 3.0 to 5.0 atmospheres and an intercooler for providing the inle

A compound cycle engine system has a rotary engine, which rotary engine generates exhaust gas. The system further has a compressor for increasing the pressure of inlet air to be supplied to the engine to a pressure in the range of from 3.0 to 5.0 atmospheres and an intercooler for providing the inlet air to the engine at a temperature in the range of from 150 to 250 degrees Fahrenheit. The system further has one or more turbines for extracting energy from the exhaust gas. The Miller Cycle is implemented in the rotary engine, enabling the compression ratio to be lower than the expansion ratio, allowing the overall cycle to be optimized for lowest weight and specific fuel consumption.

대표청구항 ▼

What is claimed is: 1. A compound cycle engine system comprising: a rotary engine having a displacement of from 1 to 10 liters, said rotary engine generating exhaust gas; said rotary engine being operated so that intake and exhaust pressures are within 0.5 atmospheres; said rotary engine having an

What is claimed is: 1. A compound cycle engine system comprising: a rotary engine having a displacement of from 1 to 10 liters, said rotary engine generating exhaust gas; said rotary engine being operated so that intake and exhaust pressures are within 0.5 atmospheres; said rotary engine having an intake port and an exhaust port; said intake and exhaust ports being arranged so that said engine has a cycle in which an internal expansion volume is greater than an internal compression volume; means for supplying inlet air at a pressure in the range of from 3.0 to 5.0 atmospheres and a temperature in the range of from 150 to 250 degrees Fahrenheit to said rotary engine; said air supplying means comprising a compressor; a first turbine connected to the compressor by a shaft, said first turbine receiving said exhaust gas from said engine and reducing exhaust gas pressure; a second turbine having an output shaft, said second turbine receiving said exhaust gas and having an expansion ratio in the range of 2.0:1 to 7.0:1; and said engine having a power shaft and said output shaft of said second turbine being connected to said power shaft. 2. The compound cycle engine system according to claim 1, wherein said compressor raises the pressure of said inlet air to said 3.0 to 5.0 atmospheres and said air supplying means further comprises an intercooler for receiving said inlet air at said raised pressure from said compressor and for lowering the temperature of said inlet air to said 150 to 250 degree Fahrenheit range. 3. The compound cycle engine system according to claim 1, wherein said output shaft is connected to said power shaft via a gear arrangement. 4. The compound cycle engine system according to claim 1, wherein said intake port opens at 0 to 15 degrees after top dead center and closes at 115-140 degrees after bottom dead center. 5. The compound cycle engine system according to claim 1, wherein said compressor has a compression ratio in the range of from 3.0:1 to 5.0:1. 6. The compound cycle engine system according to claim 1, wherein said rotary engine has a cooling system which operates at a temperature up to 250 degrees Fahrenheit. 7. The compound cycle engine system according to claim 1, wherein said rotary engine maintains a peak cycle pressure in the range of from 1200 to 1800 psia. 8. The compound cycle engine system according to claim 1, wherein said exhaust gas has a temperature in the range of from 1500 to 1800 degrees Fahrenheit. 9. The compound cycle engine system according to claim 1, wherein said exhaust gas has a pressure in the range of from 3.0 to 5.0 atmospheres. 10. A compound cycle engine system comprising: a rotary engine, said rotary engine generating exhaust gas; means for supplying inlet air at a pressure in the range of from 3.0 to 5.0 atmospheres and a temperature in the range of from 150 to 250 degrees Fahrenheit to said rotary engine; said air supplying means comprising a compressor; means for extracting energy from said exhaust gas; said energy extracting means comprising a first turbine connected to the compressor by a shaft which receives said exhaust gas from said engine; said energy extracting means comprising a second turbine having an output shaft, said second turbine receiving said exhaust gas from an outlet of said first turbine, and said second turbine has an expansion ratio in the range of 2.1:1 to 7.0:1; said engine has a power shaft and said output shaft being connected to said power shaft; said rotary engine being a Miller cycle rotary engine; said rotary engine having an intake port and an exhaust port; said intake and exhaust ports being arranged so that said engine has a cycle in which an internal expansion volume is greater than an internal compression volume; said engine having an intake port which opens opening at 0 to 15 degrees after top dead center and which closes closing at 115-140 degrees after bottom dead center; and said engine having an exhaust port which opens opening at 70 to 90 degrees before bottom dead center. 11. The compound cycle engine system according to claim 10, wherein said exhaust port closes at 38 to 65 degrees after top dead center. 12. The compound cycle engine system according to claim 10, wherein said rotary engine has a displacement in the range of 1.0 liter to 10 liters. 13. A vehicle having a propulsion system, which propulsion system comprises a compound cycle engine system comprising: a rotary engine having a displacement of from 1 to 10 liters, said rotary engine generating exhaust gas; said rotary engine being operated so that intake and exhaust pressures are within 0.5 atmospheres; said rotary engine having an intake port and an exhaust port; said intake and exhaust ports being arranged so that said engine has a cycle in which an internal expansion volume is greater than an internal compression volume; means for supplying inlet air at a pressure in the range of from 3.0 to 5.0 atmospheres and a temperature in the range of from 150 to 250 degrees Fahrenheit to said rotary engine; said air supplying means comprising a compressor; means for extracting energy from said exhaust gas; said energy extracting means comprising a first turbine connected only to the compressor by a shaft, which said first turbine receives said exhaust gas from said engine; said energy extracting means comprising a second turbine having an output shaft, said second turbine receiving said exhaust gas from an outlet of said first turbine, and said second turbine has an expansion ratio in the range of 2.1:1 to 7.0:1; and said engine has a power shaft and said output shaft being connected to said power shaft. 14. The vehicle according to claim 13, wherein said compressor raises the pressure of said inlet air to said 3.0 to 5.0 atmospheres and said air supplying means further comprises an intercooler for receiving said inlet air at said raised pressure from said compressor and for lowering the temperature of said inlet air to said 150 to 250 degree Fahrenheit range. 15. The vehicle according to claim 13, wherein said output shaft is connected to said power shaft via a gear arrangement. 16. The vehicle according to claim 13, wherein said intake port opens at 0 to 15 degrees after top dead center and closes at 115-140 degrees after bottom dead center. 17. The vehicle according to claim 16, wherein said exhaust port opens at 70 to 90 degrees before bottom dead center. 18. The vehicle according to claim 17, wherein said exhaust port closes at 38 to 65 degrees after top dead center. 19. The vehicle according to claim 13, wherein said compressor has a compression ratio in the range of from 3.0:1 to 5.0:1. 20. The vehicle according to claim 13, wherein said rotary engine has a cooling system which operates at a temperature up to 250 degrees Fahrenheit. 21. The vehicle according to claim 13, wherein said rotary engine maintains a peak cycle pressure in the range of from 1200 to 1800 psia. 22. The vehicle according to claim 13, wherein said exhaust gas has a temperature in the range of from 1500 to 1800 degrees Fahrenheit. 23. The vehicle according to claim 13, wherein said exhaust gas has a pressure in the range of from 3.0 to 5.0 atmospheres. 24. The vehicle according to claim 13, wherein said vehicle comprises an aircraft. 25. The vehicle according to claim 13, wherein said vehicle comprises a rotorcraft. 26. The vehicle according to claim 13, wherein said vehicle comprises a ground vehicle. 27. The vehicle according to claim 13, wherein said vehicle comprises a watercraft.