EGR apparatuses, systems, and methods
First Claim
Patent Images
1. A method comprising:
- operating an internal combustion engine to output exhaust;
recirculating a portion of the exhaust;
cooling the recirculated exhaust with a first cooler;
compressing the recirculated exhaust;
cooling the recirculated exhaust with a second cooler;
expanding the recirculated exhaust effective to cool the recirculated exhaust to a sub-ambient temperature; and
providing the exhaust to an intake of the internal combustion engine.
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Abstract
One embodiment is a unique system which is operable to provide a mixture of charge air and exhaust to an internal combustion intake at a sub-ambient temperature. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.
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Citations
24 Claims
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1. A method comprising:
- operating an internal combustion engine to output exhaust;
recirculating a portion of the exhaust;
cooling the recirculated exhaust with a first cooler;
compressing the recirculated exhaust;
cooling the recirculated exhaust with a second cooler;
expanding the recirculated exhaust effective to cool the recirculated exhaust to a sub-ambient temperature; and
providing the exhaust to an intake of the internal combustion engine. - View Dependent Claims (2, 3, 4, 5, 6)
- operating an internal combustion engine to output exhaust;
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7. A method comprising:
- operating an internal combustion engine to generate exhaust;
recirculating a portion of the exhaust to provide recirculated exhaust;
intaking air to provide charge air;
passing the recirculated exhaust gas through a cooler;
passing the charge air through a cooler;
expanding at least one of the charge air and the recirculated exhaust; and
providing a mixture of the charge air and the recirculated exhaust gas to an intake of the internal combustion engine at a sub-ambient temperature. - View Dependent Claims (8)
- operating an internal combustion engine to generate exhaust;
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9. A method comprising:
- operating an internal combustion engine to generate exhaust;
recirculating a portion of the exhaust to provide recirculated exhaust;
intaking air to provide charge air;
passing the recirculated exhaust gas through a cooler;
passing the charge air through a cooler;
expanding at least one of the charge air and the recirculated exhaust wherein the expanding at least one of the charge air and the recirculated exhaust includes passing a mixture of the charge air and the recirculated exhaust through an expansion turbine; and
providing the mixture of the charge air and the recirculated exhaust gas to an intake of the internal combustion engine at a sub-ambient temperature.
- operating an internal combustion engine to generate exhaust;
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10. A system comprising:
- engine means for generating exhaust;
valve means for recirculating the exhaust to provide recirculated exhaust;
compressor means for intaking air to provide charge air;
expander means for expanding a mixture of the charge air and the recirculated exhaust; and
manifold means for providing the mixture of the charge air, having been expanded, and the recirculated exhaust gas to an intake of an internal combustion engine at a sub-ambient temperature.
- engine means for generating exhaust;
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11. A system comprising:
- an exhaust conduit flow coupled to an exhaust source;
a first EGR cooler flow coupled to the exhaust conduit and operable to cool exhaust received from the exhaust conduit;
a compressor flow coupled to the first EGR cooler and operable to compress exhaust received from the first EGR cooler;
a second EGR cooler flow coupled to the compressor and operable to cool exhaust received from the compressor; and
an expander flow coupled to the second EGR cooler and operable to cool exhaust received from the second EGR cooler to a sub-ambient temperature. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
- an exhaust conduit flow coupled to an exhaust source;
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19. A system comprising:
- an exhaust conduit flow coupled to an exhaust outlet of an internal combustion engine;
a first cooler flow coupled to the exhaust conduit and operable to cool exhaust received from the exhaust conduit;
a second cooler flow coupled to the first cooler and operable to cool exhaust received from the first cooler;
an expander operable to expand at least one of exhaust and charge air;
wherein the system is operable to provide a mixture of charge air and exhaust to the internal combustion engine intake at a sub-ambient temperature. - View Dependent Claims (20, 21, 22)
- an exhaust conduit flow coupled to an exhaust outlet of an internal combustion engine;
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23. A system comprising:
- an exhaust conduit flow coupled to an exhaust source of an internal combustion engine;
a first cooler flow coupled to the exhaust conduit and operable to cool exhaust received from the exhaust conduit;
a second cooler flow coupled to the first cooler and operable to cool exhaust received from the first cooler;
an expander operable to expand charge air;
wherein the system is operable to provide a mixture of the charge air having been expanded by the expander and the exhaust to the internal combustion engine intake at a sub-ambient temperature.
- an exhaust conduit flow coupled to an exhaust source of an internal combustion engine;
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24. A system comprising:
- an exhaust conduit flow coupled to an exhaust source of an internal combustion engine;
a first cooler flow coupled to the exhaust conduit and operable to cool exhaust received from the exhaust conduit;
a second cooler flow coupled to the first cooler and operable to cool exhaust received from the first cooler;
an expander operable to expand a mixture of charge air and exhaust;
wherein the system is operable to provide the mixture of the charge air and the exhaust, having been expanded by the expander, to the internal combustion engine intake at a sub-ambient temperature.
- an exhaust conduit flow coupled to an exhaust source of an internal combustion engine;
Specification