Method and systems for a variable geometry turbocharger for an engine

Patent metadata

Field	Value
Publication number	US-10907497-B2
Application number	US-201816219462-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Dec 13, 2018
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

Various methods and systems are provided for a variable geometry turbine. In one example, a system for an engine comprises a turbocharger turbine including a nozzle ring, the nozzle ring including a plurality of stationary vanes, each vane of the plurality of stationary vanes including a plurality of injection ports arranged at an outer surface of the vane and a gas supply system to supply variable gas flow to and out of the plurality of injection ports.

First claim

The invention claimed is:

1. A system for an engine, comprising:
at least one cylinder;
a turbocharger turbine receiving exhaust gas from the at least one cylinder through an exhaust passage fluidly coupled to the at least one cylinder and the turbocharger turbine, wherein the turbocharger includes a nozzle ring, the nozzle ring includes a plurality of stationary vanes, and each stationary vane of the plurality of stationary vanes includes at least one injection port arranged at an outer surface of the stationary vane; and
a gas supply system supplying variable gas flow to and out of the at least one injection port.

2. The system of claim 1 , further comprising at least one sensor and a controller in communication with the at least one sensor, wherein the controller determines an operating condition based on a signal from the at least one sensor and wherein the gas supply system responsive to receiving a command from the controller supplies the variable gas flow based on the operating condition of the engine.

3. The system of claim 2 , wherein the gas supply system includes an electronically controlled valve system fluidly coupled with the at least one injection port and in response to receiving a command from the controller adjusts an amount of air supplied via the at least one injection port based on the operating condition of the engine.

4. The system of claim 3 , wherein the operating condition is an engine power level.

5. The system of claim 1 , wherein the at least one injection port includes a plurality of injection ports divided into a plurality of groups including at least a first group of injection ports and a second group of injection ports.

6. The system of claim 5 , further comprising a controller and wherein the gas supply system comprises a first valve adjusting air flow to the first group of injection ports responsive to receiving a command from the controller and a second valve adjusting air flow to the second group of injection ports responsive to receiving a command from the controller.

7. The system of claim 1 , wherein a central axis of a first stationary vane of the plurality of stationary vanes and wherein the central axis defines a long axis of the first stationary vane and is angled relative to central axes of stationary vanes arranged adjacent to the first stationary vane on the nozzle ring.

8. The system of claim 1 , wherein the plurality of stationary vanes is fixed and immovable and wherein the at least one injection port is circular in shape.

9. A method for an engine, comprising:
at a controller, receiving a signal from at least one sensor and determining an operating parameter of the engine based on the signal; and
commanding an adjustment of an amount of air injected from at least one injection port arranged on an outer surface of a vane of a turbine nozzle ring of a turbine to adjust a boundary layer on the outer surface and a throat opening of the turbine nozzle ring based on the operating parameter;
wherein the turbine receives exhaust gas from at least one cylinder in the engine and is fluidly coupled to the at least one cylinder via an exhaust passage.

10. The method of claim 9 , wherein the adjustment of the amount of air is performed while maintaining the vane stationary on the turbine nozzle ring.

11. The method of claim 9 , wherein the at least one injection port includes a plurality of injection ports, wherein the operating parameter is an engine power level, and further comprising, as the engine power level decreases, at the controller, commanding a number of injection ports to progressively increase the amount of air injected by the injection ports via increasing a number of injection ports that are injecting air.

12. The method of claim 11 , wherein progressively increasing the amount of air injected includes increasing a number of rows of the plurality of injection ports that inject air.

13. The method of claim 12 , wherein adjusting the amount of air injected further includes, at the controller, sending an actuation command to a valve system arranged outside of the turbine, which comprises the turbine nozzle ring, to allow air to flow from a compressor to the vane, and increase a number of open valves of the valve system to increase the amount of air injected, wherein the compressor is rotationally driven by the turbine.

14. The method of claim 13 , wherein the valve system comprises a series of valves, a first valve of the series of valves adjusts air flow through a first row of injection ports of the vane, and a second valve of the series of valves adjusts air flow through a second row of injection ports of the vane.

15. The method of claim 9 , wherein the adjustment of the amount of air injected includes increasing the amount of air injected to increase the boundary layer and decrease the throat opening of the turbine nozzle ring in response to decreasing engine load and/or increasing pre-turbine temperature and wherein adjusting the amount of air injected includes decreasing the amount of air injected to decrease the boundary layer and increase the throat opening of the turbine nozzle ring in response to increasing engine load and/or decreasing pre-turbine temperature.

16. A system for an engine, comprising:
a turbocharger including a compressor driven by a turbine, the turbine including a nozzle ring with a plurality of stationary vanes mounted thereon, each stationary vane of the plurality of stationary vanes including multiple rows of air passages within the stationary vane, wherein each air passage terminates at at least one injection port arranged on an outer surface of the stationary vane;
an air flow control system fluidly coupled to the compressor and the multiple rows of air passages of each stationary vane; and
a controller including computer-readable instructions stored on memory that when executed during operation of the engine cause the controller to:
actuate the air flow control system to adjust, for each stationary vane, a number of rows of the multiple rows of air passages receiving air from the compressor via the air flow control system as an engine power level of the engine changes.

17. The system of claim 16 , wherein the computer-readable instructions further cause the controller to actuate the air flow control system to block air flow from the compressor to the multiple rows of air passages when the engine power level is greater than a threshold power level.

18. The system of claim 16 , wherein the at least one injection port is a plurality of injection ports, each air passage is fluidly coupled to the plurality of injection ports, and adjacent air passages of the multiple rows of air passages are fluidly separated from one another.

19. The system of claim 16 , wherein the computer-readable instructions further cause the controller to increase the number of rows of the multiple rows of air passages receiving air from the compressor via the air flow control system in response to a gas temperature upstream of the turbine increasing above a threshold temperature.

20. The system of claim 16 , wherein the air flow control system includes a valve system, the valve system comprising a valve for each air passage of the stationary vane, and only the valves of the valve system move to adjust air flow through the multiple rows of air passages.

Assignees

• Ge Global Sourcing Llc
• Transp Ip Holdings Llc

Inventors

• Kobielski Louis
• Uygun Baris
• Felton Adam

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F05D2250/141

  circular · CPC title

• F05D2240/128

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• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F02B37/12

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