Disclosed is a turbocharged internal combustion piston engine system that includes a waste-heat recovery system. The waste-heat recovery system involves injecting heated water into the cylinders during combustion to increase engine power and efficiency and to reduce emissions. The engine can be a sp
Disclosed is a turbocharged internal combustion piston engine system that includes a waste-heat recovery system. The waste-heat recovery system involves injecting heated water into the cylinders during combustion to increase engine power and efficiency and to reduce emissions. The engine can be a spark or compression ignition type of engine, and can utilize fuels including but not limited to diesel, natural gas, gasoline, and ethanol. The engine also includes a turbocharger that utilizes a turbine in the exhaust gas flow to provide power to a compressor in the intake air flow to pressurize the intake air and provide additional charge flow to the engine to increase engine output.
대표청구항▼
1. A waste heat recovery system for a turbocharged engine, comprising: an internal combustion engine with one or more cylinders, the internal combustion engine to receive intake air and produce an exhaust gas flow of exhaust gasses;a turbocharger that extracts energy from the exhaust gas flow and co
1. A waste heat recovery system for a turbocharged engine, comprising: an internal combustion engine with one or more cylinders, the internal combustion engine to receive intake air and produce an exhaust gas flow of exhaust gasses;a turbocharger that extracts energy from the exhaust gas flow and compresses the intake air;a water source that receives water condensed out of the exhaust gas flow;a pump to pressurize the water condensed out of the exhaust gas flow;one or more heat exchangers to heat said water using waste heat from said internal combustion engine; and,one or more electronically controlled direct injectors to inject fuel and said water that has been pressurized and heated into at least one engine cylinder of said internal combustion engine where said water and said fuel are injected independently through separate passages in said direct injectors. 2. The waste heat recovery system of claim 1, wherein said water is injected into said at least one engine cylinder at the end of a compression stroke of said at least one engine cylinder. 3. The waste heat recovery system of claim 1, wherein said water injected into said at least one cylinder is pressurized and heated to a supercritical state. 4. The waste heat recovery system of claim 3, wherein said waste heat from said internal combustion engine is from cooling water and exhaust gasses downstream of a turbine of said turbocharger of said internal combustion engine. 5. The waste heat recovery system of claim 4, wherein said waste heat from said internal combustion engine is additionally from an EGR cooler of said internal combustion engine. 6. A method of recovering waste heat for a turbocharged engine, comprising: providing an internal combustion engine with one or more cylinders, the internal combustion engine to receive intake air and produce an exhaust gas flow of exhaust gasses;providing a turbocharger that extracts energy from the exhaust gas flow and compresses intake air;providing a water reservoir;pressurizing water from said water reservoir to produce pressurized water;heating said pressurized water with waste heat from said internal combustion engine to produce supercritical water;providing one or more electronically controlled direct injectors that inject fuel and said supercritical water independently through separate passages in said direct injectors into one or more cylinders of said engine; and,injecting said supercritical water into one or more cylinders of said engine such that said water flashes into a vapor thereby providing power to said one or more cylinders during a power stroke of said one or more cylinders. 7. The method of claim 6, wherein water is condensed out of the exhaust gas flow and supplied to said water reservoir. 8. The method of claim 7, wherein the water reservoir is supplied water from a filtered water supply. 9. The method of claim 6, wherein the water reservoir comprises a refillable tank. 10. The method of claim 9, wherein the water reservoir is additionally supplied water condensed out of said exhaust gas flow. 11. The method of claim 6, wherein said pressurized water is heated by engine coolant and engine exhaust gasses downstream of a turbine of said turbocharger. 12. The method of claim 6, wherein said water is injected into said one or more cylinders at the end of a compression stroke of said one or more cylinders. 13. The method of claim 6, wherein said water cools engine exhaust gasses prior to said engine exhaust gasses entering said turbocharger. 14. A turbocharged engine system, comprising: a turbocharger comprising a turbine and a compressor, the turbine to be powered by an exhaust gas flow of exhaust gasses of the engine system, the compressor to compress intake air;a tank to hold water, the tank to receive water that was condensed out of the exhaust gas flow of the engine system;a pump to pressurize water from said tank thereby producing pressurized water;one or more heat exchangers to, using heat produced by said engine system, heat said pressurized water to a supercritical state thereby producing supercritical water; and,an injector to inject fuel and said supercritical water into a cylinder of said engine system at a timing corresponding to combustion in said cylinder, so that said water provides additional power to said cylinder during a power stroke of said cylinder, where said injector has separate passages to inject said fuel and said supercritical water independently. 15. The engine system of claim 14, wherein a first heat exchanger is an intercooler. 16. The engine system of claim 14, wherein said one or more heat exchangers utilize heat from engine coolant and exhaust gasses downstream from said turbine to heat said pressurized water. 17. The engine system of claim 16, further comprising: a third heat exchanger to heat said pressurized water using heat from an EGR cooler. 18. The engine system of claim 14, further comprising: a valve to recirculate said water from said pump back to said tank to prevent injection of said water into said cylinder of said engine system when heat produced by said engine system is insufficient to heat said pressurized water. 19. The engine system of claim 14, wherein said water injected into a cylinder of said engine system moderates combustion in said cylinder thereby reducing NOx production.
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이 특허에 인용된 특허 (2)
Haldeman Charles W. ; Ahern Brian S. ; Johnson Keith H., Supercritical water fuel composition and combustion system.
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