Ejector for vaporized fuel gas recirculation devices

Patent metadata

Field	Value
Publication number	US-10280876-B2
Application number	US-201715840524-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 29, 2016
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

An ejector for vaporized fuel gas recirculation devices is provided. The ejector for vaporized fuel gas recirculation devices reduces the number of elements equipped in a vehicle and an ejector mounting angle is adjusted to be suitable for a layout environment of the vehicle. Accordingly, a mounting cavity of the vehicle is more efficiently designed. When an intake pressure of an intake manifold is reduced a base component is moved in a direction toward a first nozzle component, and a region of the base component except an aperture closes the first nozzle component.

First claim

What is claimed is:

1. An ejector for vaporized fuel gas recirculation devices for performing an opening/closing operation of allowing a vaporized fuel gas collected into a canister to flow into an intake manifold of an engine when a boosting pressure is generated by driving of a compressor of a turbocharger for vehicles, comprising:
a first nozzle component, having an inlet and an outlet that are perpendicular to each other, and a first mating surface formed at the outlet of the first nozzle component;
a second nozzle component, having a first inlet, a second inlet, an outlet, a second mating surface formed at the second inlet of the second nozzle component, and a third mating surface formed at the outlet of the second nozzle component, wherein the second mating surface is coupled to the first mating surface of the first nozzle component;
a diffuser, having an inlet and an outlet, and a fourth mating surface formed at the inlet of the diffuser, wherein the fourth mating surface is coupled to the third mating surface of the second nozzle component; and
a reverse flow prevention plate disposed between the first nozzle component and the second nozzle component to prevent the vaporized fuel gas from reversely flowing in a direction toward the first nozzle component,
wherein the first nozzle component and the diffuser are positioned by rotating at a desired angle with respect to the second nozzle component and then welded to the second nozzle component, and
wherein the reverse flow prevention plate comprises:
a base component having a disc-shaped outer circumference; and
a plurality of apertures formed within the outer circumference of the base component, wherein the reverse flow prevention plate is moved toward the first nozzle component, and a central region of the base component closes the outlet of the first nozzle component when an intake pressure of the intake manifold is reduced.

2. The ejector of claim 1 , wherein the first nozzle component comprises:
a first nozzle body component provided in a right-angled shape, a first channel port passing through the first nozzle body component along the right-angled shape; and
a plate movement limitation component limiting movement of the reverse flow prevention plate in a direction toward the first nozzle component, and the plurality of apertures are disposed in an edge of the base component more outward than a region where the first channel port is provided.

3. The ejector of claim 2 , wherein when the intake pressure of the intake manifold is reduced, the reverse flow prevention plate moves toward the first nozzle component, and the first channel port is closed by a center of the base component.

4. The ejector of claim 2 , wherein the second nozzle component comprises:
a first body component provided in a rectilinear shape, a second channel port passing through the first body component along the rectilinear shape;
a second body component protruding in a vertical direction from an outer circumference surface of the first body component, a third channel port passing through the second body component; and
a plate positioning component extending in a direction from the outer circumference surface of the first body component to the first nozzle component in the third channel port, the reverse flow prevention plate being disposed in the plate positioning component, and the reverse flow prevention plate is disposed between the plate positioning component and the plate movement limitation component.

5. The ejector of claim 4 , wherein a first supporting jaw is disposed in the first body component and extends in a direction, where the diffuser is disposed, from one end of the first body component coupled to the diffuser, and
wherein a second supporting jaw is disposed in the second body component and extends in a direction, where the first nozzle component is disposed, from one end of the second body component coupled to the first nozzle component, the first supporting jaw is welding-coupled to one end of the diffuser coupled to the interior of the first supporting jaw, and the second supporting jaw is welding-coupled to one end of the first nozzle component coupled to the interior of the second supporting jaw.

6. The ejector of claim 5 , wherein the first supporting jaw is coupled to the diffuser via laser welding, and the second supporting jaw is coupled to the first nozzle component via laser welding.

7. The ejector of claim 4 , wherein a first end of the third channel port communicates with the first channel port, and a second end communicates with the second channel port.

8. The ejector of claim 4 , wherein a thickness of the reverse flow prevention component is less than a distance between the plate positioning component and the plate movement limitation component.

9. The ejector of claim 4 , wherein the second channel port is narrowed in a direction opposite to a direction in which the boosting pressure flows in.

10. The ejector of claim 4 , wherein the diffuser comprises:
a diffuser body component provided in a rectilinear shape, a fourth channel port passing through the diffuser body component along the rectilinear shape, and the vaporized fuel gas, which has flowed in through the first nozzle component, being emitted from the diffuser; and
a coupling component disposed in the compressor of the turbocharger, and the fourth channel port communicates with the first channel port and the third channel port.

11. An ejector for a vaporized fuel gas recirculation device, comprising:
a first nozzle component, having an inlet and an outlet that are perpendicular to each other, and a first mating surface formed at the outlet of the first nozzle component;
a second nozzle component, having a first inlet, a second inlet, an outlet, a second mating surface formed at the second inlet of the second nozzle component, and a third mating surface formed at the outlet of the second nozzle component, wherein the second mating surface is configured to be coupled to the first mating surface of the first nozzle component;
a diffuser, having an inlet and an outlet, and a fourth mating surface formed at the inlet of the diffuser, wherein the fourth mating surface is configured to be coupled to the third mating surface of the second nozzle component; and
a reverse flow prevention plate disposed between the first nozzle component and the second nozzle component to prevent a gas from reversely flowing in a direction toward the first nozzle component,
wherein each of the first mating surface, the second mating surface, the third mating surface, and the fourth mating surface is axisymmetric, and
wherein the reverse flow prevention plate comprises:
a base component having a disc-shaped outer circumference; and
a plurality of apertures formed within the outer circumference of the base component, wherein the reverse flow prevention plate is moved toward the first nozzle component, and a central region of the base component closes the outlet of the first nozzle component when an intake pressure of the intake manifold is reduced.

12. The ejector of claim 11 , wherein the first nozzle component and the diffuser are rotatable with respect to the second nozzle component.

Assignees

• Hyundai Kefico Corp

Inventors

• Lee Ahn Hee

Classifications

• F04D27/0215

  Arrangements therefor, e.g. bleed or by-pass valves · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02M25/0836 Primary

  Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold · CPC title

• F02M25/089

  Layout of the fuel vapour installation · CPC title

• F16K15/181

  Mechanical Engineering · mapped topic