Engine arrangements with egr systems
AssigneeCummins Inc.
InventorsAnthony Kyle Perfetto, Samuel C. Geckler, Hongfeng H. Wang
Life of this patent
Estimating the term…
Abstract
Systems, apparatus, and methods are disclosed that include a divided exhaust engine with at least one pair of primary EGR cylinders and a plurality of pairs of non-primary EGR cylinders. The pair of primary EGR cylinders can be connected to an intake with an EGR system that lacks an EGR cooler. In another embodiment, the cylinder pairs include exhaust flow paths that join in the cylinder head to form a common exhaust outlet for each cylinder pair in the cylinder head that is connected directly to the EGR system or to the exhaust system without an exhaust manifold.
Claims19
1-8. (canceled)
A system comprising:
- an internal combustion engine having at least one pair of primary exhaust gas recirculation (EGR) cylinders connected to a common EGR passage to provide an EGR flow to an intake of the engine and a plurality of pairs of non-primary cylinders with each non-primary cylinder pair connected to a respective one of a plurality of common exhaust passages to provide an exhaust flow to a respective one of a plurality of turbine inlets connected to the respective common exhaust passage.
A system comprising:
- an internal combustion engine including six cylinders, wherein first and second cylinders are adjacent one another and flow connected to a first turbine through a first common exhaust passage, wherein third and fourth cylinders are adjacent one another and flow connected through a common exhaust gas recirculation (EGR) passage to an EGR conduit that is connected to an intake manifold of the engine without an EGR cooler between third and fourth cylinders and the intake, and wherein fifth and sixth cylinders are adjacent one another and flow connected to a second turbine through a second common exhaust passage.
A system comprising:
- an internal combustion engine including six cylinders, wherein first and second cylinders are adjacent one another and flow connected to a turbine through a first common exhaust passage, wherein third and fourth cylinders are adjacent one another and flow connected through a common exhaust gas recirculation (EGR) passage to an EGR conduit that is connected to an intake manifold of the engine between third and fourth cylinders and the intake, and wherein fifth and sixth cylinders are adjacent one another and flow connected to the turbine through a second common exhaust passage.
Dependencies are inferred from the claim text.