SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM
First Claim
1. A system for an engine, comprising:
- a first set of exhaust valves fluidly coupled to an exhaust passage, upstream of a turbocharger turbine, a first emission control device (ECD), and a second ECD disposed within the exhaust passage, the second ECD positioned downstream of the first ECD; and
a second set of exhaust valves fluidly coupled to an intake passage and the exhaust passage, between the first ECD and the second ECD.
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Accused Products
Abstract
Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, the split exhaust engine system may include a first set of exhaust valves fluidly coupled to the exhaust passage, upstream of a turbocharger turbine, a first emission control device (ECD), and a second ECD disposed within the exhaust passage, the second ECD positioned downstream of the first ECD. The system may further include a second set of exhaust valves fluidly coupled to the intake passage and the exhaust passage, between the first ECD and the second ECD.
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Citations
21 Claims
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1. A system for an engine, comprising:
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a first set of exhaust valves fluidly coupled to an exhaust passage, upstream of a turbocharger turbine, a first emission control device (ECD), and a second ECD disposed within the exhaust passage, the second ECD positioned downstream of the first ECD; and a second set of exhaust valves fluidly coupled to an intake passage and the exhaust passage, between the first ECD and the second ECD. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for an engine, comprising:
while exhaust gases are flowing from a first set of cylinder exhaust valves to an exhaust passage, downstream of a turbocharger turbine, at least partially closing a wastegate valve disposed within a bypass passage disposed around the turbocharger turbine and flowing at least a portion of exhaust gases from a second set of cylinder exhaust valves through the turbocharger turbine. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for an engine, comprising:
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flowing exhaust gas from a first set of exhaust valves to a turbocharger turbine, an upstream, first catalyst, and a downstream, second catalyst disposed in an exhaust passage; flowing a first portion of exhaust gas from a second set of exhaust valves to only the second catalyst and not the first catalyst; and opening the second set of exhaust valves at a different timing in an engine cycle than the first set of exhaust valves. - View Dependent Claims (19, 20, 21)
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Specification