Systems and methods for operating a twin scroll turbocharged engine with a junction configured to selectively control exhaust gas delivery to an exhaust gas recirculation system and a twin scroll turbine are provided.
대표청구항▼
1. A turbocharged engine comprising: a first scroll and a second scroll fluidically coupled to a turbine, the first scroll coupled to a first set of engine cylinders, the second scroll coupled to a second set of engine cylinders;a first EGR takeoff including a first valve, the first EGR takeoff flui
1. A turbocharged engine comprising: a first scroll and a second scroll fluidically coupled to a turbine, the first scroll coupled to a first set of engine cylinders, the second scroll coupled to a second set of engine cylinders;a first EGR takeoff including a first valve, the first EGR takeoff fluidically coupled to the first scroll;a second EGR takeoff including a second valve, the second EGR takeoff fluidically coupled to the second scroll;an EGR conduit coupled to the first and second EGR takeoffs having an EGR valve positioned therein downstream of both the first and second valves; anda computer readable storage medium having instructions encoded thereon, including: instructions to, during a first condition close the first and second valves; andinstructions to, during a second condition open the first and second valves. 2. The engine of claim 1, wherein the first condition includes high load and low speed engine operating conditions. 3. The engine of claim 1, wherein the second condition includes high load and high speed engine operating conditions. 4. The engine of claim 1, wherein the first and second valves are dual butterfly valves. 5. The engine of claim 4, wherein the dual butterfly valves include a coolant circulating therethrough, and where the dual butterfly valves are coupled to a common rotating shaft. 6. The engine of claim 5, wherein the dual butterfly valves are housed in a dual-bored body. 7. The engine of claim 1, wherein the first and second valves are configured to open and close synchronously. 8. The engine of claim 1, wherein the instructions further include instructions to close the first and second valves during engine accelerations. 9. The engine of claim 1, further comprising a dual-bore body with an engine mount having a substantially flat mounting portion coupled with the engine, and further having a turbine mount opposing the engine mount, the turbine mount having a substantially flat mounting portion coupled with the turbine. 10. The engine of claim 1, wherein the instructions further include instructions to operate the engine with a second amount of positive valve overlap in at least one cylinder of the engine during the second condition, where the second amount of positive valve overlap is less than a first amount of positive valve overlap employed during the first condition. 11. The engine of claim 1, wherein the instructions further include instructions to operate the engine with a second amount of spark retard in at least one cylinder of the engine, where the second amount of spark retard is less than a first amount of spark retard used in the first condition. 12. A turbocharged engine comprising: a first scroll and a second scroll fluidically coupled to a turbine, the first scroll coupled to a first set of engine cylinders, the second scroll coupled to a second set of engine cylinders;a first EGR takeoff including a first valve, the first EGR takeoff fluidically coupled to the first scroll;a second EGR takeoff including a second valve, the second EGR takeoff fluidically coupled to the second scroll, both the first and second EGR takeoffs positioned in a junction therebetween;an EGR conduit coupled to the first and second EGR takeoffs downstream of the junction; anda computer readable storage medium having instructions encoded thereon, including: instructions to, during a first condition close the first and second valves; andinstructions to, during a second condition open the first and second valves. 13. The engine of claim 12, wherein the first condition includes high load and low speed engine operating conditions. 14. The engine of claim 13, wherein the second condition includes high load and high speed engine operating conditions. 15. The engine of claim 14, wherein the first and second valves are dual butterfly valves. 16. The engine of claim 15, wherein the dual butterfly valves include a coolant circulating therethrough, and where the dual butterfly valves are coupled to a common rotating shaft. 17. The engine of claim 16, wherein the dual butterfly valves are housed in a dual-bore body. 18. The engine of claim 13, wherein the first and second valves are configured to open and close synchronously. 19. The engine of claim 13, wherein the instructions further include instructions to close the first and second valves during engine accelerations. 20. The engine of claim 12, further comprising a dual-bore body with an engine mount having a substantially flat mounting portion coupled with the engine, and further having a turbine mount opposing the engine mount, the turbine mount having a substantially flat mounting portion coupled with the turbine. 21. The engine of claim 12, wherein the instructions further include instructions to operate the engine with a second amount of spark retard in at least one cylinder of the engine, where the second amount of spark retard is less than a first amount of spark retard used in the first condition. 22. The engine of claim 12, wherein the instructions further include instructions to operate the engine with a second amount of positive valve overlap in at least one cylinder of the engine during the second condition, where the second amount of positive valve overlap is less than a first amount of positive valve overlap employed during the first condition.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Yamagata, Naoyuki, Control of supercharged engine.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.