Apparatus, system, and method for reducing emission of nitrogen oxides
First Claim
1. A system for reducing emissions of nitrogen oxides, the system comprising:
- an internal combustion engine, comprising;
an intake manifold structured to provide intake air to the internal combustion engine,an exhaust manifold structured to receive exhaust gas from the internal combustion engine, andan exhaust line fluidly coupled to the exhaust manifold;
a first exhaust gas recirculation subsystem comprising a first exhaust gas recirculation line structured to transmit exhaust gas from one of the exhaust manifold and the exhaust line to the intake manifold;
a second exhaust gas recirculation subsystem, comprising;
an exhaust gas compressor,an exhaust gas storage volume downstream of the exhaust gas compressor, anda second exhaust gas recirculation line structured to transmit exhaust gas from the exhaust line to the exhaust gas compressor, from the exhaust gas compressor to the exhaust gas storage volume, and from the exhaust gas storage volume to the intake manifold; and
a controller apparatus in electrical communication with the second exhaust gas recirculation subsystem, the controller apparatus configured to control insertion of compressed exhaust gas from the exhaust gas storage volume to the internal combustion engine, thereby reducing the emission of nitrogen oxides.
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Accused Products
Abstract
An apparatus, system and method for reducing the emission of nitrogen oxides in an internal combustion engine system. Exhaust gas directly or indirectly downstream of the internal combustion engine is at least selectively stored in an exhaust gas storage region. Upon the occurrence of at least one enablement condition, indicative of a potential period where the emission of nitrogen oxides (NOx) will increase, the stored exhaust gas is inserted into the internal combustion engine to assist in reducing the emission of the nitrogen oxides. The exhaust gas storage volume regularly, or the exhaust gas storage volume may be filled during strategic periods when the emissions of nitrogen oxides are low and/or there is a low need for the recirculation of exhaust gas.
20 Citations
36 Claims
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1. A system for reducing emissions of nitrogen oxides, the system comprising:
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an internal combustion engine, comprising; an intake manifold structured to provide intake air to the internal combustion engine, an exhaust manifold structured to receive exhaust gas from the internal combustion engine, and an exhaust line fluidly coupled to the exhaust manifold; a first exhaust gas recirculation subsystem comprising a first exhaust gas recirculation line structured to transmit exhaust gas from one of the exhaust manifold and the exhaust line to the intake manifold; a second exhaust gas recirculation subsystem, comprising; an exhaust gas compressor, an exhaust gas storage volume downstream of the exhaust gas compressor, and a second exhaust gas recirculation line structured to transmit exhaust gas from the exhaust line to the exhaust gas compressor, from the exhaust gas compressor to the exhaust gas storage volume, and from the exhaust gas storage volume to the intake manifold; and a controller apparatus in electrical communication with the second exhaust gas recirculation subsystem, the controller apparatus configured to control insertion of compressed exhaust gas from the exhaust gas storage volume to the internal combustion engine, thereby reducing the emission of nitrogen oxides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for reducing emissions of nitrogen oxides, the method comprising:
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providing first and second exhaust gas recirculation subsystems; storing, in an exhaust gas storage volume of the second exhaust gas recirculation subsystem, exhaust gas discharged from an internal combustion engine, the exhaust gas being compressed by an exhaust gas compressor, the exhaust gas storage volume being downstream of the exhaust gas compressor; determining that at least one exhaust gas insertion enablement condition is being met; and if it is determined that the at least one exhaust gas insertion enablement condition is being met, inserting compressed exhaust gas stored in the exhaust gas storage volume into the internal combustion engine to reduce the emission of nitrogen oxides. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A computer program product, embodied in a tangible, non-transitory computer-readable medium, comprising computer executable instructions configured to cause a system to:
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provide first and second exhaust gas recirculation subsystems; store, in an exhaust gas storage volume of the second exhaust gas recirculation subsystem, exhaust gas discharged from an internal combustion engine, the exhaust gas being compressed by an exhaust gas compressor, the exhaust gas storage volume being downstream of the exhaust gas compressor; determine that at least one exhaust gas insertion enablement condition is being met; and if it is determined that the at least one exhaust gas insertion enablement condition is being met, insert compressed exhaust gas stored in the exhaust gas storage volume into the internal combustion engine to reduce emissions of nitrogen oxides. - View Dependent Claims (36)
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Specification