A system for controlling the mixture of an air flow and an exhaust gas flow utilizing two valves, the first valve at least partially positioned in an air intake conduit and regulating the flow of fluid through the air conduit, and the second valve positioned in an exhaust gas recirculation conduit f
A system for controlling the mixture of an air flow and an exhaust gas flow utilizing two valves, the first valve at least partially positioned in an air intake conduit and regulating the flow of fluid through the air conduit, and the second valve positioned in an exhaust gas recirculation conduit for regulating the flow of exhaust gas. The control scheme presenting a sequential or stepwise control sequence, where the first valve is actuated over a first pressure range and the second valve is actuated over a second pressure range such that valves operate in a sequential manner.
대표청구항▼
What is claimed is: 1. A system for controlling the mixture of air and recirculating exhaust gas, comprising: an air conduit defined by a wall for communicating air therethrough; an exhaust gas inlet passing through the wall of said air conduit for introducing exhaust gas into said air conduit; and
What is claimed is: 1. A system for controlling the mixture of air and recirculating exhaust gas, comprising: an air conduit defined by a wall for communicating air therethrough; an exhaust gas inlet passing through the wall of said air conduit for introducing exhaust gas into said air conduit; and an air flow regulator, at least partially positioned in said air conduit, said air flow regulator regulating the amount of air passing through said air conduit; a restriction valve, positioned ahead of said exhaust gas inlet in an exhaust gas recirculation conduit, said restriction valve regulating the amount of exhaust gas introduced into said air conduit; said air flow regulator and said restriction valve providing a sequential control scheme where during a first pressure range said flow regulator is actuated and during a second pressure range said restriction valve is actuated. 2. The system according to claim 1 wherein said air flow regulator comprises a proportional valve. 3. The system according to claim 1, wherein said first pressure range and said second pressure range do not overlap. 4. The system according to claim 3, wherein said first pressure range is from approximately 0 psi to approximately 50 psi, and said second pressure range is from approximately 50 psi to approximately 100 psi. 5. The system according to claim 1 wherein said air flow regulator comprises a sleeve at least partly disposed in said air conduit, said sleeve having an inlet end through which air enters said sleeve and an outlet end through which air flowing through said sleeve exits said sleeve into said air conduit, the outlet end of said sleeve being disposed in said air conduit. 6. The system according to claim 5 wherein the outlet end of said sleeve is positionable along said air conduit to at least partly occlude said exhaust gas inlet and is movable along a portion of said air conduit to vary the extent of occlusion of said exhaust gas inlet in order to regulate flow of exhaust gas into said air conduit. 7. The system of claim 5, further comprising a streamlined body disposed in said air conduit, wherein said body is stationary with respect to said conduit and the outlet end of said sleeve is moveable over at least part of said body to at least partly occlude the outlet end of said sleeve. 8. The system according to claim 5, further comprising a streamlined body disposed in said air conduit and positionable along said air conduit to at least partly occlude the outlet end of said sleeve. 9. The system of claim 8, further comprising an actuator for moving said streamlined body along said air conduit to vary the extent of occlusion of the outlet end of said sleeve in order to regulate flow of air out of said sleeve. 10. The system of claim 8, wherein said streamlined body is substantially located outside of said sleeve. 11. The system of claim 8, wherein said streamlined body includes a tapered end moveable through the outlet end of said sleeve. 12. The system of claim 11, wherein the tapered end of said streamlined body is ovoid. 13. A system for controlling the mixture of air and recirculating exhaust gas, comprising: an air conduit defined by a wall for communicating air therethrough; an exhaust gas inlet passing through the wall of said air conduit for introducing exhaust gas into said air conduit, said exhaust gas inlet coupled to an exhaust gas recirculation conduit; an air flow regulator, at least partially positioned in said air conduit, said air inlet flow regulator regulating the amount of air passing through said air conduit; a restriction valve, positioned in the exhaust gas recirculation conduit, said restriction valve regulating the amount of exhaust gas introduced into said air conduit; a first pressure range during which said air flow regulator is actuated; and a second pressure range during which said restriction valve is actuated; said air flow regulator and said restriction valve operating in a sequential manner such that when said air flow regulator is fully actuated, then said restriction valve will actuate. 14. The system according to claim 13, wherein said first pressure range is from approximately 0 psi to approximately 50 psi, and said second pressure range is from approximately 50 psi to approximately 100 psi. 15. The system according to claim 13 wherein said air flow regulator comprises a sleeve at least partly disposed in said air conduit, said sleeve having an inlet end through which air enters said sleeve and an outlet end through which air flowing through said sleeve exits said sleeve into said air conduit, the outlet end of said sleeve being disposed in said air conduit. 16. The system according to claim 15 wherein the outlet end of said sleeve is positionable along said air conduit to at least partly occlude said exhaust gas inlet and is movable along a portion of said air conduit to vary the extent of occlusion of said exhaust gas inlet in order to regulate flow of exhaust gas into said air conduit. 17. The system of claim 15, further comprising a streamlined body disposed in said air conduit, wherein said body is stationary with respect to said conduit and the outlet end of said sleeve is moveable over at least part of said body to at least partly occlude the outlet end of said sleeve. 18. The system according to claim 15, further comprising a streamlined body disposed in said air conduit and positionable along said air conduit to at least partly occlude the outlet end of said sleeve. 19. The system of claim 18, further comprising an actuator for moving said streamlined body along said air conduit to vary the extent of occlusion of the outlet end of said sleeve in order to regulate flow of air out of said sleeve. 20. The system of claim 18, wherein said streamlined body is substantially located outside of said sleeve. 21. The system of claim 18, wherein said streamlined body includes a tapered end moveable through the outlet end of said sleeve. 22. The system of claim 21, wherein the tapered end of said streamlined body is ovoid. 23. A method for controlling the mixture of air and recirculating exhaust gas in a combustion engine, comprising the step of: drawing air in through an air conduit; coupling an exhaust gas conduit to the air conduit; passing exhaust gas into the exhaust gas conduit to recirculate into the air conduit; controlling an air flow regulator, which regulates the amount of air passing through the air conduit, over a first pressure range; and controlling a restriction valve, which regulates the amount of exhaust gas passing through the exhaust gas conduit, over a second pressure range; wherein the air flow regulator and the restriction valve operate in a sequential manner such that when the air flow regulator is fully actuated, then the restriction valve will actuate. 24. The method according to claim 23, wherein said first pressure range is from approximately 0 psi to approximately 50 psi, and said second pressure range is from approximately 50 psi to approximately 100 psi. 25. The method according to claim 23 wherein the air flow regulator includes a sleeve at least partly disposed in the air conduit and having an inlet end through which air enters said sleeve and an outlet end through which air flowing through said sleeve exits. 26. The method according to claim 25 further comprising the steps of variably positioning the outlet end of the sleeve along the air conduit to at least partly occlude the exhaust gas inlet in order to regulate flow of exhaust gas into said air conduit. 27. The method according to claim 25, further comprising the steps of disposing a streamlined body in the air conduit and variably positioning the streamlined body along the air conduit to at least partly occlude the outlet end of the sleeve. 28. The method of claim 27, further comprising the steps of moving the streamlined body along the air conduit to vary the extent of occlusion of the outlet end of the sleeve in order to regulate flow of air out of the sleeve. 29. The method of claim 27, wherein the streamlined body includes a tapered end moveable through the outlet end of the sleeve.
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