Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1990-05-30
1991-05-21
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
123569, 60278, F02M 2507
Patent
active
050165992
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION OF INVENTION
This invention relates to a combustion process apparatus provided with facilities for operation in a recycle mode, hereinafter referred to as a "closed cycle apparatus", comprising a combustion chamber, delivery means to deliver inert carrier gas, combustion supporting gas and fuel into the combustion chamber, means to cause the fuel to burn in the combustion chamber, means to exhaust exhaust gas from the combustion chamber and a circuit through which exhaust gas is ducted from the combustion chamber or to the combustion chamber to provide the carrier gas, the circuit including means by which at least some of the exhaust gas is treated to remove carbon dioxide from the exhaust gas.
Such engines are capable of operating efficiently where free atmospheric air is not available, for example, under water or where communication/convection with the atmosphere is undesirable, such as in certain types of mine.
An object of the invention is to provide a new and improved closed cycle internal combustion engine of the kind specified above.
According to one aspect of the present invention, we provide a closed cycle apparatus comprising a combustion chamber, delivery means to deliver inert carrier gas, combustion supporting gas and fuel into the combustion chamber, means to cause the fuel to burn in the combustion chamber, means to exhaust exhaust gas from the combustion chamber, a circuit through which exhaust gas is ducted from the combustion chamber and returned to the combustion chamber to provide the carrier gas, the circuit including means by which the exhaust gas is treated to remove carbon dioxide from the exhaust gas wherein a part only of the exhaust gas in said circuit is treated to remove carbon dioxide.
Means may be provided to cool the remainder of the exhaust gas in said circuit, which is fed to the combustion chamber without treatment to remove carbon dioxide, prior to entry to the combustion chamber.
Means may be provided to compress said part of the exhaust gas prior to said treatment to remove carbon dioxide.
Means may be provided to cool said part of the exhaust gas prior to compression.
Means may be provided to cool said part of the exhaust gas after compression.
Means may be provided to recover pressure energy from said part of the exhaust gas after treatment to remove carbon dioxide.
Said means may comprise an injector whereby said part of the gas is injected into a conduit through which said remainder of the gas flows to the combustion chamber of the engine.
The result is an increase in the inlet pressure compared with the engine exhaust pressure so that greater energy is available at the output of the engine by virtue of reduced back pressure.
According to another aspect of the present invention we provide a closed cycle apparatus comprising an internal combustion engine comprising a combustion chamber, delivery means to deliver inert carrier gas, combustion supporting gas and fuel into the combustion chamber, means to cause the fuel to burn in the combustion chamber, means to exhaust exhaust gas from the combustion chamber, a circuit through which exhaust gas is ducted from the combustion chamber and returned to the combustion chamber to provide the carrier gas, the circuit including means by which the exhaust gas is treated to remove carbon dioxide from the exhaust gas wherein the exhaust gas is fed by the circuit into driving relationship with turbo charger turbine means and then into compressing relationship with turbo charger impeller means, whereby the exhaust is compressed prior to treatment to remove carbon dioxide.
Means may be provided to cool the exhaust gas after leaving said driving relationship with the turbine means before entering said compressing relationship with the impeller means.
Means may be provided to feed the whole of the exhaust gas into said driving relationship with said turbine means.
Means may be provided to separate the compressed exhaust gas downstream of the impeller means into a first part which is treated to remove carbon dioxide and a
REFERENCES:
patent: 4231225 (1980-11-01), Aya
patent: 4587807 (1986-05-01), Suzuki
patent: 4674463 (1987-06-01), Duckworth et al.
patent: 4756285 (1988-07-01), Pischinger
Cosworth Deep Sea Systems Limited
Wolfe Willis R.
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