SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM
First Claim
1. A method, comprising:
- adjusting a timing of a first set of cylinder exhaust valves to adjust a flow of exhaust from engine cylinders to an intake passage, upstream of a compressor, via an exhaust gas recirculation (EGR) passage, where the first set of cylinder exhaust valves open at a different time than a second set of cylinder exhaust valves coupled to an exhaust passage.
1 Assignment
0 Petitions
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, a flow of exhaust (e.g., exhaust gas recirculation) from engine cylinders to the intake passage, upstream of a compressor, via an exhaust gas recirculation (EGR) passage and the first exhaust manifold may be adjusted by adjusting a timing of a first set of cylinder exhaust valves coupled to the first exhaust manifold. Additionally, the first set of cylinder exhaust valves open at a different time than a second set of cylinder exhaust valves coupled to the exhaust passage.
-
Citations
20 Claims
-
1. A method, comprising:
adjusting a timing of a first set of cylinder exhaust valves to adjust a flow of exhaust from engine cylinders to an intake passage, upstream of a compressor, via an exhaust gas recirculation (EGR) passage, where the first set of cylinder exhaust valves open at a different time than a second set of cylinder exhaust valves coupled to an exhaust passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
10. A method, comprising:
-
during a first mode, adjusting a flow of exhaust gas from a first set of cylinder exhaust valves to an intake passage, upstream of a compressor, via adjusting each of a position of an exhaust gas recirculation (EGR) valve disposed in an EGR passage and a timing of the first set of cylinder exhaust valves; during a second mode, adjusting the flow of exhaust gas via adjusting only the position of the EGR valve and not the timing of the first set of cylinder exhaust valves; and during a third mode, adjusting the flow of exhaust gas via adjusting only the timing of the first set of cylinder exhaust valves and not the position of the EGR valve. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
-
18. A system, comprising:
-
a first set of cylinder exhaust valves coupled exclusively to a first exhaust manifold; a second set of cylinder exhaust valves coupled exclusively to a second exhaust manifold; an exhaust passage coupled to the second exhaust manifold and including a turbine; an exhaust gas recirculation (EGR) passage including an EGR valve and coupled between an intake passage, upstream of a compressor, and the first exhaust manifold; and a controller including memory with instructions stored thereon for; adjusting a timing of the first set of cylinder exhaust valves in response to a request to adjust a flow of EGR from the first exhaust manifold to the intake passage via the EGR passage. - View Dependent Claims (19, 20)
-
Specification