Method and system for vacuum generation using a throttle

Patent metadata

Field	Value
Publication number	US-9964080-B2
Application number	US-201615247492-A
Country	US
Kind code	B2
Filing date	Aug 25, 2016
Priority date	Aug 25, 2016
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

Methods and systems are provided for a throttle plate and a vacuum consumption device. In one example, a method may include providing vacuum to a vacuum consumption device with a venturi passage inside a throttle.

First claim

The invention claimed is:

1. A system comprising:
a throttle valve having a venturi passage located inside its throttle body, the venturi passage configured to receive intake air directly from an intake passage when the venturi passage is parallel to a direction of incoming intake air flow, the venturi passage being a first annular venturi passage located interior to a second annular venturi passage, the first annular venturi passage located on a geometric center of the throttle body and the second annular venturi passage located between an edge of the throttle body and the first annular venturi passage.

2. The system of claim 1 , wherein the throttle valve is beveled at top and bottom edges, the edges forming venturi passages outside the throttle body between the throttle body and an intake conduit.

3. The system of claim 2 , wherein the top and bottom edges comprise openings located at extreme ends of the venturi passage inside the throttle body.

4. The system of claim 2 , wherein the venturi passages between the throttle body and the intake conduit are formed when the throttle body is in a more closed position, and where the venturi passage inside the throttle body is parallel to the direction of incoming intake air flow when the throttle body is in a more open position, and where the more closed position allows less intake air to flow to an engine than the more open position.

5. The system of claim 1 , wherein the first annular venturi passage is fluidly coupled to the second annular venturi passage via a connecting passage located along a vertical axis.

6. The system of claim 1 , wherein the first and second annular venturi passages are concentric about the direction of incoming intake air flow.

7. The system of claim 1 , wherein the first and second annular venturi passages are parallel to the direction of incoming intake air flow when the throttle body is in a closed position.

8. The system of claim 7 , wherein the closed position includes edges of the throttle body being pressed against interior surfaces of an intake conduit preventing intake air from flowing therethrough.

9. A system comprising:
an engine including an intake;
a throttle plate mounted on a hollow shaft positioned in the intake, the throttle plate having a first opening located on its circumference and a second opening located on its circumference diametrically opposite the first opening, and a venturi passage located inside the throttle plate between the first and second openings; and
a controller with computer-readable instructions stored in non-transitory memory for:
in response to engine operations, adjusting a position of the throttle plate to adjust intake air flow while generating vacuum through the adjusting of the throttle plate as intake air flows through the venturi passage or through constricted passages formed between the intake and the first and second openings.

10. The system of claim 9 , further comprising a vacuum consumption device, wherein the hollow shaft of the throttle plate is fluidly coupled to the vacuum consumption device and a throat of the venturi passage in the throttle plate.

11. The system of claim 10 , wherein the vacuum consumption device is one of a brake booster, a fuel vapor canister, and a vacuum actuated valve.

12. The system of claim 9 , wherein the first opening faces an upstream direction and the second opening faces a downstream direction relative to a direction of incoming intake air flow when the throttle plate is in a more open position, and where intake air enters the venturi passage via the first opening and exits the venturi passage via the second opening.

13. The system of claim 9 , wherein the first opening and second opening face an interior surface of an intake conduit of the intake when the throttle plate is in a more closed position, and where intake air flows through constricted passages located between the intake conduit and the first and second openings.

14. The system of claim 9 , wherein the venturi passage narrows between the first and second openings toward a venturi throat such that the venturi throat is a narrowest portion of the venturi passage.

15. The system of claim 14 , further comprising a shaft fluidly coupled to the venturi throat such that a vacuum generated at the venturi throat is provided to a vacuum consumption device through the shaft.

16. A system comprising:
a throttle body located along an intake conduit configured to receive intake air via first and second annular venturi passages each located inside the throttle body whose edges are sealed with interior surfaces of the intake conduit in a closed position, the first passage located interior to the second passage and on a geometric center of the throttle body, the second passage located between a throttle body edge and the first passage.

17. The system of claim 16 , wherein the first venturi passage and second venturi passage are annular, and where the first venturi passage is located along the geometric center of the throttle body and is interior to the second venturi passage.

18. The system of claim 16 , wherein intake air only flows by the throttle body by flowing through the first and second venturi passages when the throttle body is in the closed position, and where intake air flows through an opening formed between the intake conduit and throttle body when the throttle body is in an open position.

19. The system of claim 16 , wherein the first venturi passage and the second venturi passage are fluidly coupled via a connecting passage, the connecting passage being further coupled to a vacuum consumption device.

Assignees

• Ford Global Tech Llc

Inventors

• Zhang Xiaogang

Classifications

• F02M37/025 Primary

  Feeding by means of a liquid fuel-driven jet pump (jet pumps per se F04F) · CPC title

• F02D9/1005

  Details of the flap · CPC title

• F02M33/02

  for collecting and returning condensed fuel {(apparatus for re-atomising condensed fuel F02M29/00)} · CPC title

• F02D9/1055 Primary

  having a fluid by-pass · CPC title

• F02M25/0836

  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