Compressor bypass turbine-generator
First Claim
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1. A method of controlling air of an engine having a compressor, comprising:
- generating energy by directing at least a portion of compressed intake air through a turbine of a turbine-generator by closing a compressor bypass valve to block recirculation of the compressed intake air,wherein the compressor bypass valve arranged in a compressor bypass passage is in a first position, the turbine positioned in a turbine passage, and the turbine passage coupled to the compressor bypass passage;
recirculating at least a portion of compressed intake air from an outlet of the compressor to an inlet of the compressor without passing through the turbine of the turbine-generator by opening the compressor bypass valve to a second position.
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Abstract
Embodiments for a turbine-generator position in a compressor bypass flow path are presented. In one example, a method for an engine having a compressor comprises generating energy via a turbine-generator positioned in a bypass flow path of the compressor. In this way, the energy of the recirculated intake air may be recovered by the turbine-generator.
13 Citations
17 Claims
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1. A method of controlling air of an engine having a compressor, comprising:
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generating energy by directing at least a portion of compressed intake air through a turbine of a turbine-generator by closing a compressor bypass valve to block recirculation of the compressed intake air, wherein the compressor bypass valve arranged in a compressor bypass passage is in a first position, the turbine positioned in a turbine passage, and the turbine passage coupled to the compressor bypass passage; recirculating at least a portion of compressed intake air from an outlet of the compressor to an inlet of the compressor without passing through the turbine of the turbine-generator by opening the compressor bypass valve to a second position. - View Dependent Claims (2, 3)
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4. A method of controlling air of an engine having a compressor, comprising:
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directing intake air through a compressor and to the engine; when a ratio of a compressor pressure ratio to a mass air flow is above a first threshold and below a second threshold, recirculating at least a portion of the intake air from downstream of the compressor to upstream of the compressor via a turbine of a turbine-generator, by closing the compressor bypass valve, wherein the turbine is positioned in a turbine passage coupled to a compressor bypass passage; and when the ratio is above the second threshold, recirculating at least a portion of the intake air from downstream of the compressor to upstream of the compressor without passing through the turbine of the turbine-generator by opening the compressor bypass valve. - View Dependent Claims (5)
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6. A system comprising:
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a compressor bypass passage configured to recirculate compressed intake air from an outlet of a turbocharger compressor to an inlet of the turbocharger compressor; a turbine positioned in a turbine passage coupled to the compressor bypass passage; a compressor bypass valve positioned over an intersection of the compressor bypass passage and the turbine passage; and an energy conversion device coupled to the turbine. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification